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Display problem


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#1 wolfie7

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Posted 14 December 2011 - 01:12 PM

Hi

This started a couple of days ago when my display suddenly went psychedelic. A garbled mess of black vertical lines and colours. Rebooting lead to the same garbled display , i had to switch off the power before rebooting to get the display back to normal.

I've downloaded the latest drivers from Nvidia , but that hasn't solved the problem. My screen still suddenly goes psychedelic , a jumbled mass of colours. A few letters are visible in the mess . I have to undo the power plug each time and then reboot to get a normal display , but it keeps happening.

Grateful for any ideas or suggestions.

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#2 computerxpds

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Posted 14 December 2011 - 01:38 PM

Hello!

Sounds to me like a bad video card. I would start looking for a new one. But just to be sure, when was the last time you cleaned out the inside of the computer? Also is there anything that might be causing this to happen?
And last but not least please post your system specs. :)

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#3 wolfie7

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Posted 14 December 2011 - 03:42 PM

Windows XP Service Pack 3.

I gave the inside of my PC a clean up after this first happened. Can't think of any reason why this should suddenly start happening. My Graphics Card is an Nvidia GeForce 8400GS , just over 2 years old.

#4 LucheLibre

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Posted 14 December 2011 - 06:01 PM

Sounds like an electrical short that may be temperature-activated.

Make sure you pull out the GPU when you blow out the dust.

At any rate, there's three main things to rule out:

First try a different cable, then a different monitor. Finally, if neither of those things pan out, either find a friend who has a spare PCI or PCI-E card, or buy some cheapie PCI card from ebay or CL, swap it out and see if the problem persists.

If it looks like I know what I'm doing, there's a pretty good chance the only reason for that is because
I once asked someone to run chkdsk /r and a BC Advisor smacked me in the back of the head.

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#5 wolfie7

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Posted 14 December 2011 - 06:34 PM

Thanks , i'll try those options next time it happens , and give the graphics card a good clean up.

#6 wolfie7

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Posted 15 December 2011 - 07:45 AM

Hardware monitor NVIDIA I/O
Temperature 0 79C (174F) [0x4F] (TMPIN0)

Hardware monitor NVIDIA NVAPI
Temperature 0 79C (174F) [0x4F] (TMPIN0)


Are those temperatures too high and the possible cause of my problems ?

#7 LucheLibre

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Posted 15 December 2011 - 11:09 PM

If those are idle temps, then yes, that is quite high. It's somewhat high for load temps.

The most straightforward answer is that your card has not been getting proper cooling and has been getting too hot for too long and has finally started to fail.

However, if it HAS been getting proper cooling, it should be noted that the G86 line of GPUs had a confirmed overheating problem caused by a mistake in manufacture. You may have been bitten by this.

http://en.wikipedia.org/wiki/GeForce_8_Series (bottom of entry)

If it looks like I know what I'm doing, there's a pretty good chance the only reason for that is because
I once asked someone to run chkdsk /r and a BC Advisor smacked me in the back of the head.

~ LL ~


#8 wolfie7

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Posted 16 December 2011 - 11:53 AM

That may well explain it. Many thanks for the info.




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