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Crashing after flicker on screen

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#1 anonanon


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Posted 16 September 2014 - 11:03 AM

I have a desktop PC running Win XP (SP 3).  It has begun intermittently crashing, with this behavior:


- for a few seconds, a pattern of small black rectangles flashes rapidly across the screen

- then the system hangs; cursor is frozen, keyboard won't work, ctrl-alt-del won't work

- I force a shutdown with the power button

- It reboots to windows normally


It stays on a few minutes, or a few hours, before it crashes again.  It has crashed within a few minutes of starting up after being off overnight -- so a buildup of heat doesn't seem to be the problem.


What are the most likely things that could be causing this?  How can I test to try to identify or eliminate those possible causes?


Thanks for ideas,


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#2 mjd420nova


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Posted 16 September 2014 - 12:45 PM

I'd start with the power supply first as the most likely suspect.  The voltage circuits are seperate from each other and have their own regulators so one or more could be dropping out.  If not the P/S,  I would suspect the CPU, heatsink and fan, observation will give the biggest clues.  A multimeter on the P/S during operation might help to eliminate or confirm its failure.

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