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Old 03-18-2006, 07:40 PM   #1 (permalink)
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Default Is my CPU fried?

For a while now my backup computer (Dell Dimension 4500, Pentium 4) has been starting up with error “Processor fan not detected”. I left the machine on overnight as usual, and today its not working. It was not “on” when I woke, and the power button does not work to start the system.

I heard that Pentium 4 processors will shut down before it “over heats”. So, I need to figure out if this system is scap metal or if I can somehow bring it back online. I only need this system to operate for a couple weeks more before i plan to replace it. But i do need it working untill then. Is there anything I can do? Thanks
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Old 03-18-2006, 08:08 PM   #2 (permalink)
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...adding to this... I opened the box and see a small green light on the motherboard. Maybe a sign of life? When an electrical breaker box trips, you must flip it off and on again. Is there a switch for a PC to do the same? Just trying to get this thing back on...

I heard P4 processors will shut down automatically before they overheat. So at this point I assume the system can be saved. Any opinions on that?
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Old 03-18-2006, 08:10 PM   #3 (permalink)
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Does the motherboard beep at startup? It should be fine as long as it doesn't.
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Old 03-18-2006, 08:26 PM   #4 (permalink)
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cpu's rarely gets fried , its the psu or mobo but more likely the psu , rma if you still got warranty otherwise buy a new psu from dell (they use proprietary parts)

Quote:
Originally posted by turtile
It should be fine as long as it doesn't.
not necessarily
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Old 03-18-2006, 08:42 PM   #5 (permalink)
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Can I test the PSU? Or reset it or something?

Thanks for the tips guys!
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Old 03-18-2006, 09:06 PM   #6 (permalink)
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theres a way actually , its called "hotwiring"
basicly its a way to powerup the psu without the motherboard , disconnect the main 20pin atx connector and find out if its a standard atx layout or a dell atx layout
dell layout : http://www.quepublishing.com/article...?p=339053&rl=1
standard layout : http://pinouts.ru/data/atxpower_pinout.shtml
if your psu got a standard atx layout then put a wire between the pin with the green wire to one of the black ones , if a dell layout then put a wire between the gray to one of the blacks (before doing any of that have the on/off switch at the back of the psu to off or unplug from the wallsocket if it dont have that switch)
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Old 03-19-2006, 01:50 AM   #7 (permalink)
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it could be that his cpu fan stoped working or came unplugged or something. try booting it with the case open and see what the cpu fan does
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Old 03-19-2006, 11:00 AM   #8 (permalink)
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Does the PSU fan spin? if not then replace PSU. Otherwise troubleshoot CPU fan and bios.
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