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03-06-2012 06:23 AM
I have a M9400z computer. Within the last 7 days, there were 2 occasions that the computer won't start immediately. The green light was on near the power supply. When I unplugged it and plugged it back on, the green light did not light up. I unplugged the machine and opened up the cover to let the air in. I played around with the voltage selection slightly the first time. After a while the machine came back on. Over the weekend, I cleaned up the CPU fan to make sure the ventilation in the computer to be good. The computer acted up again this morning. I played around with the voltage selector again, back and forth between 230 and 115. I could power up the computer again.
I suspected the problem might be due to cooling. When it happens again so soon, there may be more problem. Can it be the power supply? How can I isolate the problem? If it is the power supply, I think that I need to replace it immediately before it damage the rest of the system. Where can I get the spare parts?
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03-06-2012 06:47 AM
If the green light is not on, then the power supply is suspect. This page says it is 350watt: http://h10025.www1.hp.com/ewfrf/wc/document?docnam
I would check the phsical size to see if it is a normal ATX case size. If it is, then just replace it with a 400watt or better.
03-06-2012 12:55 PM
Here is the manual for that computer, but nothing on the powersupply: http://h10032.www1.hp.com/ctg/Manual/c01457519.pdf
Here is the parts page: http://h20141.www2.hp.com/Hpparts/Default.aspx?msc