Here is the problem: I am working on a Compaq 8xxx system with the SD11 FIC mainboard, 600 MHZ Athalon processor, and 128MB ram. The system would not boot. No post, no video. Then, after a day or two it starts right up. Then it was shut down, and wouldn't start again. I stripped the board down to processor. ram, and video card still no post. Replaced cpu, and it posts 1st time then not next. replaced ram - no post. replaced video card - no post. replaced MB - posted 1st time then not next. power supply shows correct voltages when tested under load. put all the original equipment back in and it booted up 1st time. Did a restart and it rebooted, but am afraid to shut it down. Any thoughts about what could cause this behavior????
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startup problem
- Thread starter denutz
- Start date
Can you do a hardware reset? Some earlier machines had a problem with the power good not coming up fast enough and the system shutting down. Hardware reset then booted right up.
Ed Fair
efair@atlnet.com
Any advice I give is my best judgement based on my interpretation of the facts you supply.
Help increase my knowledge by providing some feedback, good or bad, on any advice I have given.
Ed Fair
efair@atlnet.com
Any advice I give is my best judgement based on my interpretation of the facts you supply.
Help increase my knowledge by providing some feedback, good or bad, on any advice I have given.
- Thread starter
- #3
I don't understand what you mean by hardware reset. I cleared CMOS by removing the battery, but it made no difference. The machine will boot when it wants to, and then after shutdown will just fire up the fans but no video. I tried disconnecting the power switch and jumping the pins on the board, but still no post. I am going to try a new MB and Power supply. I've usually had good luck stripping the board to isolate the problem device, but this one has me stumped.
Was requesting a shorting of the reset pins if you can find them on the M/B. Ed Fair
efair@atlnet.com
Any advice I give is my best judgement based on my interpretation of the facts you supply.
Help increase my knowledge by providing some feedback, good or bad, on any advice I have given.
efair@atlnet.com
Any advice I give is my best judgement based on my interpretation of the facts you supply.
Help increase my knowledge by providing some feedback, good or bad, on any advice I have given.
txtxcowboy
MIS
Sounds like a bad CPU to me. They ONLY real piece of hardware that could cause a total POST failure.
And the only thing it looks like that you havent changed out!!
Dave
And the only thing it looks like that you havent changed out!!
Dave
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