Computer shuts down, reboots

Hi

Check your power management settings in Control Panel. These can cause a system to boot when they reduce power consumption by such a large amount that there is not enough power to keep the machine running, which then interprets the power reduction as power loss, then reboots because the power management features are no longer active (the machine has effectively switched itself off).

Disabling power management temporarily will determine if this is the cause of your problems.

Good luck

Your computer worked fine for 5 or 6 months then suddenly started doing this? You replaced the power supply and it still does it?

Do you notice any type of unusual hdd activitiy before a power down? For instance, the the hdd sound like it'slosing power before this happens? Are you nearby when it happens? Do you leave you computer on all the time?

I'd look at the hdd as the second probable point of failure (since you have already replaced the power supply & since it was working previously).

This can also potentially happen if the system is overheating. Check to make sure that the system has plenty of ventilation (vents not blocked, enclosed in a small cabinet or desk, stuff piled up around the computer, etc.) and that the fan is functioning. Fans are very inexpensive, it wouldn't hurt to try a more powerful one.

If it is an emachine (older model such as the 366i), then the problem most likely was the power supply. If it's starting to do it again, toss the modem and get a new one. The modem is corrupt and effects the wakeup on LAN settings even when theyare checked off as being off.

what kind of computer is it? i had the same problem, usually its the drivers and the order in which u install them

Is it on a UPS? The battery on the UPS might be bad and intermittently drag down the output to the PC, causing the PC to reboot (been there!).

Swap in known good RAM for a while to see if the problem goes away.

If you've got DLL version conflict or outright corruption, that can make the system flaky. Is it Win 98? Try System File Checker and restore files that were modified, but do so cautiously. Choose to backup copy files that are restored, and note where the system stores the backup copies. Then, if when you reboot after Checker restoration of files and the system crashes, Safe DOS boot and copy the contents of the backup directory back into the files' original locatons.

NOTE: it's a good idea to backup your documents first!

Good luck!

Is it on a UPS? The battery on the UPS might be bad and intermittently drag down the output to the PC, causing the PC to reboot (been there!).

Swap in known good RAM for a while to see if the problem goes away.

If you've got DLL version conflict or outright corruption, that can make the system flaky. Is it Win 98? Try System File Checker and restore files that were modified, but do so cautiously. Choose to backup copy files that are restored, and note where the system stores the backup copies. Then, if when you reboot after Checker restoration of files and the system crashes, Safe DOS boot and copy the contents of the backup directory back into the files' original locatons.

NOTE: it's a good idea to backup your documents first!

Good luck!