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Computer will not start

by Stanley Huang / February 5, 2008 11:20 AM PST

Operating system: Windows XP Professional
How long did it survive: 1 and a half year
Processor: intel pentium 4
Motherboard: 775i65G
PSU: 250W
CD-ROM, Floppy drive 80GB HDD
Nothing was touched inside
if you want more information just ask.

One day the computer just shut off we tried to turn it back on but it wouldn't work. So we took out the power supply and put it on the table with it connected and it turned on! but a month later the computer would not turn on. Sometimes it did and would shut off in a few minutes. the power light turns on, the hard drive light turns on fans spin CD-ROM lights and a second later it shuts off it doesn't give beeps, nothing displayed on monitor it doesn't even get pass the bios (post). i tried removing the power supply and using another perfectly working one. No use the computer still would did the same. It's definitely a hardware problem can it be the motherboard?

Any help would be helpful!

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PSU: 250W
by R. Proffitt Forum moderator / February 5, 2008 11:48 AM PST

That's light. Try a new one.

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RE:Computer will not start
by Stanley Huang / February 6, 2008 3:04 AM PST
In reply to: PSU: 250W

So i should get a new motherboard

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Try this.
by R. Proffitt Forum moderator / February 6, 2008 3:32 AM PST

Put THE DEAD PC into You'll find the methods I use.

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Like to add...
by Willy / February 6, 2008 3:08 AM PST

Get another higher wattage compatible psu. The old one has become iffy and the replacement you tried(good right?) may not be capable as well. The mtrbd. could have be stressed during the old psu operation it could have failed. Thus, even with a known good psu installed the mtbd. has become faulty or failed. There is no real simple test other than installing a good psu(higher watts) in order to be stable. Then, if it still fails to boot, then you're left possible bad mtrbd. or other componet which was weak that failed when the psu did or was stressed beyond its limits. Heat, is a stress factor and it reduces the stability of the system overtime and causes 2ndary problems. You can reduce power demands by removing(unplug) all drives and see if some display is possible. Check my provided post for similar issue:

You need to recheck your work. Verify all cables& harness(reseat) are proper. YES, it is possible when the psu went bad it took something else with it, but that's what troubleshooting is all about, fixing all the problems. You need to reduce the system to its basic form and then see what it does. You don't need any HD, CD drives, just the kybd., video, and maybe FD. Power-ON, do you get at least some display. It will error, but you add device(power-OFF) 1 at a time, reboot and check results. You can remove all devices, even the cpu, power-ON does the system beep? Return cpu properly and retry, results?


Look at the above website or similar for clues. Last, don't take anything for granted. How do you know the "working psu" was good? get back to us.

tada -----Willy Happy

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