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Screen Tablet malarky => Heyaaaalpppp => Topic started by: wchestnutt on December 23, 2012, 09:13:08 PM



Title: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 23, 2012, 09:13:08 PM
Hello guys and gals!

My name is William and have some issues with a cintiq...

I recently received a cintiq 21UX in the post bought form the interweb, and very poorly wrapped. Basically just shoved in a huge empty box! :'( My heart sank when I picked up the box and heard everything rattling around!

so, on first inspection the cintiq screen was dark and half of it purple, much like this photo: http://williamschestnutts.wordpress.com/2012/12/14/broken-wacom/new-forest-20121214-00339/

I then discovered that it was only running in VGA mode, and put it down to a driver issue on my nvidia gtx280.. I backed up to a 3 year old video driver and behold it worked at full brightness and in DVI mode.

Now the half blue screen is still there... some days it completely vanishes after 10 minutes, others it doesn't. If I change the brightness it changes the range of pixels that are affected...  it seems to only be a certain contrast or colour range that is affected by the blue glow as demonstrated in the video:

http://www.youtube.com/watch?v=6Ke5yYMU3dc&feature=youtu.be

Could this be complete LCD destruction, or more likely a video driver/cable?... Any ideas how easy it is to get to the connections on the main board to have a fiddle on the 21UX?

I have done a test with some colour blocks in case this helps anyone? It seems as though it is the blue doobywhatsit that has broken as the other colours are all OK... (strange that it is only around half of the screen that is affected...?)


http://williamschestnutts.wordpress.com/2012/12/14/broken-wacom/new-forest-20121223-00353/

Now I am getting most of my money back for the cintiq for the sake of the damage, so now just to either use it as it stands (annoying) or find or pay for a fix.. I have prices from wacom which range from £40 for a cable repair, £400 for a video driver board thing, to £800 for a new LCD... NOT what I wan't to pay!


Worst comes to worst I will have to just sell it on for spares, but hopefully can get something out of it....

All the best, William.




Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: janm on December 25, 2012, 11:00:26 PM


How come you're only getting most of your money back?   

How much are they keeping back?   this would determine if its worth taking the risk and trying to fix yourself.

If it was mine and I had no alternative i'd try to see if an ffc has worked loose. It'd be tricky because some of the screws can be hard to find
and ffc's can be hidden too. If its not this the other stuff can be hard to fix...

Try looking for a guide somewhere on the net.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: Aerendraca on December 25, 2012, 11:46:32 PM
Hi Wchestnutt, welcome!

Interesting problem and truly sad if not fixable, but lets have a go at some diagnostics.

Does changing the resolution of the screen make any difference?
What about refresh rate?
Have you tried a different cable?
When you turned up the brightness in the video what that via software or on the on screen display?
If you swap the cable to a different screen does that screen work normally?
Is the Cintiq plugged into a laptop or a desktop?



Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 26, 2012, 04:26:28 PM
Hello, Thanks for the replies!

It basically ends up that I am paying £150 for the Cintiq, as it has some functionality I though this was a fair risk, otherwise it was a case of returning it for a full refund. Seeing as I have a couple of projects on the go at the moment and will be able to just about use it as it stands I thought I would give it a shot..

Yeah I was wondering about an ffc... has anyone ever opened one of these? - re they easy enough to get to once you take the back off?... How likely is it that I will break it when I take it apart?... I am pretty good with that kinda thing usually but LCD screens are so delicate I don't want to risk ruining it completely. I searched for someone that had done it before and no luck :(

Changing the resolution makes no difference to the blue portion, it is related directly to the screen as opposed to PC specific issues or drivers. Cintiq seems to be locked to 60hz so can't change that?... The cable is physically attached to the unit so can't try a different one.. have tried wiggling it around or looking for twists but doesn't make any difference.

I run a dual monitor setup on my PC and the normal screens have no issues whatever, so it is not my graphics card. this blue appears on the cintiq even if it is turned on but not plugged into the PC.

When I turned up the brightness it was using the cintiqs own menu adjustments. I think it does a similar thing when using the computers brightness setting.

Best regards, William





Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 26, 2012, 04:41:48 PM
This might be of interest...

The issue is definitely intermittent - Yesterday it worked perfectly all day, today it has blue all day. I have just turned it off for a while and when feeling the front of the screen it is warm on the right hand side of the screen, but cool on the left side where the error is. I imagine this is just taht teh right side of the screen is home to a power board or something that generated more heat?!.... Not sure.



Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: janm on December 27, 2012, 01:51:43 AM

TBH i hav'nt seen one of these open so can't advise. Doing a quick search i can't see any guides either...

One thing look at your DVI connector and on the cintiq see if you can see any bent pins or anything like that.
Also try pinching the DVI cable in different places.

The heat is probably from internal components like you suspect, i doubt its the cause of the problems.

I've destroyed two screens trying to make a DIY cintiq... some of the FFC's are very very fragile, particulary the
traces at the sides of the screens and on the flip out circuits behind the screen.

If you do try to fix it be very very careful, not just taking it apart but also around any of the ribbon cables.

Looking through past posts most people do tend to wreak a screen or two making DIY cintiq's.

having said that...

I'd take a punt and fix it myself for £150 anyday....  I've gone though £450 worth of components already.
If i had to do it all again I would get a 21ux like you've done.



Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: Aerendraca on December 27, 2012, 07:42:02 PM
From the details you posted above you are correct this is not an issue with you computer or graphics card. So this leaves a few possibilities I can think of;

1. The LVDS cable from the LCD controller to the LCD driver is not fully inserted and just needs pushing back in.
2. One of the ribbon cables along the edge of the LCD has come slightly away from the LCD glass, although my gut feeling on this is that this is unlikely as you usually see lines on the screen rather than a change in colour on one side. If this is the case it may not be possible to fix.
3. The VGA/DVI cable has come loose on the inside of the Cintiq and needs pushing back in or resoldering. Having not seen inside one I'm not sure how it will be connected.
4. Might be a power problem, dodgy capacitor perhaps. Should be obvious if this is the case as they often bulge and may leak goop.

I think you need to make a decision as to whether you feel able to take the screen apart. As far as I can see on the net nobody has attempted any kind of repair of mod/hack with a Cintiq and documented it so we are all limited with the information we can provide.
My honest feeling is that you should go for this and try to fix it, the fact that you have seen the screen working makes me think it should be repairable and probably not too difficult, additionally I would love to see some photos of the inside of the Cintiq, who know's you might be able to help us with the fight against jitter!! 


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 27, 2012, 08:42:12 PM
Hello!

Thanks for the reply guys! Very useful stuff.

So if I was to try and take it apart I could take a lot of photos fr everyone... I would hate it so much if I ended up busting the screen completely though....

It would cost me around £60 in postage for wacom to investigate the issue themselves and give me a diagnosis so as much as I love fiddling with things a fixing stuff myself I am wondering if it is worth going straight to them...... hmmm

All the best, William.



Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: Aerendraca on December 27, 2012, 08:50:36 PM
Well William, it's entirely up to you. It would be nice to see the inside of a real Cintiq but I'm not going to bully you into it, you have to do what you feel is right and it sounds like maybe sending it off to Wacom might be the right thing to do in your case.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 27, 2012, 09:21:50 PM
Hello,

I have my brother visiting this week who is an IT expert so I will speak with him and possibly suggest opening it up... If I do this is probably the best time and will take photos for people to see :)

Best, William.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: janm on December 27, 2012, 10:04:27 PM
From the details you posted above you are correct this is not an issue with you computer or graphics card. So this leaves a few possibilities I can think of;

1. The LVDS cable from the LCD controller to the LCD driver is not fully inserted and just needs pushing back in.
2. One of the ribbon cables along the edge of the LCD has come slightly away from the LCD glass, although my gut feeling on this is that this is unlikely as you usually see lines on the screen rather than a change in colour on one side. If this is the case it may not be possible to fix.
3. The VGA/DVI cable has come loose on the inside of the Cintiq and needs pushing back in or resoldering. Having not seen inside one I'm not sure how it will be connected.
4. Might be a power problem, dodgy capacitor perhaps. Should be obvious if this is the case as they often bulge and may leak goop.

I think you need to make a decision as to whether you feel able to take the screen apart. As far as I can see on the net nobody has attempted any kind of repair of mod/hack with a Cintiq and documented it so we are all limited with the information we can provide.
My honest feeling is that you should go for this and try to fix it, the fact that you have seen the screen working makes me think it should be repairable and probably not too difficult, additionally I would love to see some photos of the inside of the Cintiq, who know's you might be able to help us with the fight against jitter!! 

My gut feeling is that this is the problem.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 28, 2012, 02:24:37 AM
Hello...


Ok we took it apart tonight and took as many photos as a could... Lighting conditions weren't great but hopefully you can make stuff out...

we fiddled with all the cables and made sure they were seated correctly, and whilst the screen was apart plugged it in and fiddled and poked around using the reset button on the main board to keep the screen booting up to test it..

Unfortunately nothing we tried made any difference to the blue portion of the screen :( I will post photos tomorrow when I have a chance.

Also I have the make and model number of the LCD screen if anyone was interested?.. It is an NEC unit. and possibly worth noting that every single metal component was fully earthed to each other using copper tape around the perimeter of the unit. Another interesting thing but kinda makes sense is that the big cable coming out of the back of the cintiq ends up plugging straight into the board with a dvi  socket.

Best, William.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: Aerendraca on December 28, 2012, 12:32:13 PM
Wow that was quick!

I'm sorry to hear that you have not cleared up the problem, but something about the behavior of the screen tells me it should be fixable.

I'm sure I can speak for the others on this forum when I say that we would all be interested to know the model number of the panel used, and would also like to see the pictures you have taken. There's a small chance that we might be able to help you further from the images.

What do you think you are going to do with it now?


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 28, 2012, 01:06:34 PM
Hello,

I will probably us eit for a bit for some projects and then sell for repairs at some point, I don't think I will sink any more money on it. I will post photos soon :)

Best, William


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: janm on December 28, 2012, 01:31:34 PM


Its a shame mate...  NEC ips display probably... 
I can't see the pics, have you posted them?
I was certain it was one of the LVDS or other ribbons that might have come out of the connector.

If you decide to sell it and you're near sheffield or birmingham I can buy and collect and give it a try.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: Aerendraca on December 28, 2012, 01:54:41 PM
From what you have said about the panel and the specs on the Wacom website I am guessing that the panel is likely to be the NL160120BC27-14 by NEC.

21.3" viewable
1600 x 1200 (4:3 aspect)
20ms response time
0.270mm pixel pitch
8bit - 16.77M colours

I this is correct, what's interesting about this panel is that it's a CCFL panel and uses NECs SA-SFT technology which stands for Super Advanced - Super Fine Technology, and not IPS as many have assumed. More informaion can be found here: http://www.tftcentral.co.uk/speccontent.htm#sft

A point to note in the above article is that it is a technology not usually used in mainstream monitors (typically used in the medical industry), which presumably means that they are hard to get hold of.

A quick browse of ebay showed one 'similar' panel for sale in the US asking $530 less postage for just the panel! Perhaps it is the intended nature of the panel which drives up the cost of the Cintiq.

Of course I may have the wrong panel and so the above may be incorrect, but I have a feeling this is not the case.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 28, 2012, 02:27:21 PM
Well done, the screen is in fact a NL160120BC27-19

Uploading photos now....



Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 28, 2012, 02:32:12 PM
It seems that you can possibly source them from alibaba... http://www.alibaba.com/product-gs/528274386/21_3_NL160120BC27_19E.html

2 year gold supplier so they can be trusted. Maybe worth an email for people interested. I have often negotiated with alibaba suppliers and it has always been a good experience.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 28, 2012, 02:37:13 PM
PHOTOS::::::::

http://fatherforgets.wordpress.com/2012/12/28/16/


very high res, but poor lighting sorry...


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: Aerendraca on December 28, 2012, 02:59:06 PM
 :D Yay! Well that is very interesting indeed. And an alibaba link too which could be very useful if there's enough interest on the forum. I suppose someone would need to test this screen with say and Intuos 2, 3, 4 , or 5 before people would be happy to part with their hard earned cash but it's a marked step forwards in terms of finding a screen which does not cause jitter!

As an alternative there's also the NEC LCD2190UXp monitor which uses a similar SA-SFT screen but at a costly £550 in the UK.

I've had a quick glance at the photos, look good. I will give them a full on study later but I'm just off out.



Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 28, 2012, 03:09:05 PM
Awesome glad to help! :)

the middle board in the screen is where you plug the DVI cable into... I imagine this is the knackered board if there is one.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: Aerendraca on December 28, 2012, 09:22:36 PM
Any chance of getting a close-up on the circuit boards? A close-up of the top of the capacitors would be great.

How is the Cintiq powered? Does it have a power brick or is it plugged into the mains directly?

I'm starting to suspect a power problem, particularly a capacitor issue. The board I am most interested in closer inspecting is the board that is at the top of the 10th image covered in clear plastic (has a whole bunch of coils on it). 

When you said the problem went away was the screen switched of for a while before you switched it on again, say a few hours maybe more?

Capacitors have a wide range of uses and can cause some peculiar problems due to the nature of how they work. It sounds like you may have one that is on it's way out. This will almost certainly be the case if the problem worsens.

Although not exactly the same problem as yours, here's someone else that has had a very similar issue with a regular LCD monitor and how they went about fixing it. http://blog.dr-ivan.com/2010/10/12/how-to-fix-your-lcd-monitor-changing-capacitors/

Like I said, with a decent close up of the capacitors on all boards I should be able to tell you which if any may need to be replaced. Good news being that if it is a capacitor problem, they're easy to remove and replace (so long as you have access to a soldering iron) and capacitors are dirt cheap too!!



Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 29, 2012, 12:35:34 AM
Hello Aerendraca, unfortunately we did check all the capacitors and they looked fine, no liquid or bulges! I was hoping this would have been the problem too as it could have been replaced :(

I have just found that my power button doesn't work any more (screen is on permanently, and goes into standby when pc is off) so I imagine we missed plugging its wire back in so at some point I will probably take it apart again and will take better photos of each board in daylight :)

The times when it has been Perfect have been 5 or 10 minutes after switching it on after it being completely off. I am going to try removing the power for it overnight tonight and see if it will work perfectly tomorrow................

Best, William.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: Aerendraca on December 29, 2012, 07:21:32 PM
I have to say that this still sounds like it could be a power problem. As an alternative thought though, have you tried using a different DVI cable? I notice that you can unplug the connector inside the Cintiq.

How is the Cintiq powered by the way? Is it plugged directly to the mains?



Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 29, 2012, 08:06:28 PM
Yeah we swapped out a separate DVI cable and nothing changed so at least we can rule that out. But if anyone has a faulty DVI cable you can fix it yourself for free by just plugging in a new one rather than sending it to wacom for £100 repair!

The wacom has a transformer which plugs into the mains yeah....


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: janm on December 29, 2012, 08:50:05 PM
Have you any freinds that might have another 21ux?
if so it does not seem that hard to swap out the screen contoller board?


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: Aerendraca on December 29, 2012, 09:16:51 PM
You probably have already, but have you tried to factory reset the screen through the on screen display?

If there is no option in the main menu you can sometimes enter a sub menu by holding the power button for a few seconds. If that doesn't work try holding each of the OSD buttons independently for a few seconds.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 29, 2012, 09:55:21 PM
Hello

Yeah we tried a factory reset a few times and also a reset from the main board inside the unit.

Not a bad idea changing the board for another one... perhaps I will wait for another one to appear on ebay and buy it and try a swap.. I am the only one I know with one at this moment though.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: Aerendraca on December 30, 2012, 12:58:50 AM
I know that it was discussed earlier that the problem could not be related to the graphics card as your other monitors worked fine, but I have been reading a lot about issues related specifically to the 21UX which for the most part were linked to graphics cards.

I'm wondering if you have the dvi-i to dvi-d adapter plugged in between the graphics card and the dvi cable of the wacom. This adapter should come with the tablet and is designed to strip out the vga signal from the graphics card, if it is not installed the screen forces vga compatibility, maybe the gtx280 has a problem with this? 

It could be that the other screens work fine because they are 6bit as apposed to 8bit - shouldn't be a problem but then again the wacom does use a very high grade panel. Alternatively perhaps they do not have the vga signal confusion that the wacom has, by which I mean that they cannot accept vga signal through the dvi port (and I would think this would be true if the screens have a vga port too).

I know that you said about the screen still having the issue even with the cable unplugged but this could just be a residual memory issue related to the above which would be reset upon receiving a true digital signal.

I think it is definately worth trying to plug it in to a different computer to see if the problem persists, as this would also eliminate vram issues that appear to plague the gtx280 cards (ie onset pink screen of death).


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on December 30, 2012, 01:26:48 PM
I did test it on a second computer when I first received it and had the same issue, but am going away for a few days now and will continue further tests when I return home :)


Happy new year to everyone and thanks a lot for all the feedback and help, great community here :)

Best, William.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on January 02, 2013, 08:30:44 PM
Hi Everyone..

Hope you all had a nice New year!

interesting point on the wacom I noticed... After 5 days of a broken screen before goign away for NYE, I left the tablet unplugged for 3 days whilst I was away and now I am back after 10 minutes of being on the tablet screen is 100% perfect! If I leave it plugged in but on standby overnight I don't think I will be able to get teh screen to work properly the following day, but if it is totally unplugged from power (boards completely cool down) and then turned on and warmed up it seems to repair itself within 10 minutes and display a perfect image...

Have taken some video footage to document this for future buyers / repair peoples :)


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: Aerendraca on January 02, 2013, 10:56:52 PM
I know I've been harping on about it but I'm sticking with power issue. This is typical of a dying filter capacitor causing issues. I don't know how easy it is for you to take the power brick apart, but it might be worth a quick look inside for a big black bulging capacitor. Be careful though as it can hold a lot of charge so try not to touch the circuit board. If you find it is the filter capacitor you can get a new one for about £5 and there's a little guide at the beginning of my build log advising of how to discharge it safely, you might also want to take a look to see what the capacitor will look like (although the image on my build log shows a working cap). Alternatively see if you can get hold of or borrow a working power supply.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on January 03, 2013, 01:12:26 PM
Hello,

I can confirm that after leaving it unplugged overnight the screen works perfectly again today after ten minutes :)

The capacitors all looked perfect inside the board so will possibly try the power brick and have a look at your blog. I agree with you entirely that the symptoms would indicate this after the research I have done.

I used to have a monitor which would flicker as it warmed up which was a dying capacitor.

will have a poker around when I get the chance, thanks for your time! :)


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: Aerendraca on January 10, 2013, 03:22:06 PM
Any news on progress with the Cintiq?


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on January 11, 2013, 12:13:05 PM
Hello!

well, spent all yesterday setting up my new system ... i7 3770k overclocked to 4.5ghz, 16gb ddr3, gtx680 GPU... running loooooovely!

But in other news the Cintiq seems to slowly be on a road to full recovery via self mending.... Every day I have turned it on so far this week it has taken less time for the blue to go away, and today when it turned on it only had half the normal blue, and disappeared in less than a second!!!!!!!!

Can't believe it really, very exciting but I will wait and see. Won't count my apples until it has had a full month working perfectly :) But turning out to be a bargain 21UX, so much so that I may even buy an LX Desk mount arm for it as a treat :p

Best, William.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: janm on January 12, 2013, 09:41:03 PM


Thats great news William   :)



Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on January 20, 2013, 12:56:26 PM
Oh poo, Last night the blue screen of cintiq death came back, and today after being off all night hasn't repaired itself... :( I have ordered a new power supply in case it is at fault, and will just hope that it some point decides to work properly again.

I used a test image today and it is still just blue blue channel that is bad... Across the colour chart it looks like a sinus wave type thing of purple lines through all the different shades. ...Sigh...


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: Aerendraca on January 22, 2013, 08:49:33 AM
That's a shame. I'm interested to see how you get on with the new power supply.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on January 22, 2013, 02:01:32 PM
Turns out the power supply was out of stock so have been refunded for that and wacom have said to rule out the power supply...

I have now listed it on ebay as I am only using it as a monitor at the moment so may as well see if anyone wants it. I think it is still worth a few quid due to the LCD working and costing £800 to replace and it still potentially being fully usable! also has a new pen (£70). perhaps someone can fix her up.

Starting price is £495 which may seem a bit high but if it is a main video board defect then it totals £850 for for a fully working display is a reasonable price for a 21UX, but then again maybe someone can fix it cheaper / wacom still say it could be anything from a cable defect which is £70 repair. I don't have the expertise to open it up again and try and work out what the fault is, but it is very simple to open had someone want to.

just FYI it is taking around 50 minutes to display a perfect screen which is more like when I first got it. this is after 3 weeks of it taking sometimes only 2 seconds. I have yet to go a day without it fixing itself.

I will post the link tonight when my listing goes live.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: Aerendraca on January 22, 2013, 02:36:01 PM
Sorry to hear that. Sounds like auctioning it is probably for the best. If I had anywhere near the spare cash I would probably be tempted to buy it, but alas I do not.


Title: Re: Faulty Cintiq screen.. Any ideas on a fix?!....
Post by: wchestnutt on February 18, 2013, 12:16:06 PM
Update just for the record everyone... Havn't sold the item yet after being messed about a couple of times, But in the meanwhile I have left the wacom switched on for teh past week 24/7 so it stayed workign perfectly, and now it seems that when I turn it off and on overnight it still works perfectly, no Blue screen has been seen for the past week!... So blooming odd.