Question about Compaq Presario S5100NX (E120866) PC Desktop

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Turns on, then shuts down before anything shows on monitor

The computer shuts down almost as soon as it starts up. Then it will not start up again until I unplug it and start over. Each time, it will just shut down again. I took the side panel off and watched the LEDs on the Mother board. A green light stays on near the CPU. When I turn it on, a red light flashes for an instant at the bottom of the board, near the board slots. I tried a different power supply with no change. I tried unplugging all the power cables to the drives with no change. I unplugged and reseated the memory chip and the CPU with no change. I don't have another CPU or memory chip of the correct type to try in it. Any suggestions? I have the same problem, I just bought a whole new computer, but my CPU fan and heatsink let the CPU get up to 80 degrees, so I bought a new heatsink, and when I try to start up it shuts off before afull rotation of any fan happens...

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Is there more than one fan inside the computer? Did you double-check the connection from the fan to the motherboard? Sometimes a computer will shut down if it doesn't sense that the fan is turning on, to prevent the computer from overheating.

Posted on Jul 25, 2008

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Turn the chip around,its seated tha wrong way thats y its not booting up

Posted on Apr 29, 2009

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u check almost all ....
also check with u r power buton of front panel of pc if this button is get short then it is possible .....please disconnect switch from board & just short with any metal ....if u r pc is not geting shut down please replace rower switch ...


if this information is useful for u please Rate me........

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