[RSteph49]

I'm trying to fix a computer for a friend of mine. The computer was acting funny, and then the power supply died on them. I've found a power supply that fits to the computer, and is roughly the same model/power ratings. It has slightly more potential power supply - but I've been told that using a Power Supply that can supply more power than needed isn't a concern, only one that supplies less than needed.

The problem I'm having is: When I plug in the power supply and flip the switch on the power supply. The power light on the computer immediately turns on, but the computer never actually turns on (hard drive, processor, etc.). Similarly, the "power" light won't turn off even if I hit the power button. Would this indicate that something on the motherboard got fried and it needs replaced, or could this be a jumper setting somewhere on the board that is causing a problem, or some other similar issue?

Any help would be greatly appreciated.

---

The Computer is an E-Machine T2385, here's the specs for it:

CPU: Intel® Celeron® Processor 2.30GHz (w/128KB L2 cache & 400MHz FSB)
Operating System: Genuine Microsoft® Windows® XP Home Edition

Chipset: Intel® 845GL chipset
Memory: 512MB DDR (PC2100)
Hard Drive: 80GB HDD
Optical Drive: 48 × 24x48x Max. CD-RW Drive; 16x Max. DVD Drive; 3.5" 1.44MB FDD
Video: Intel® Extreme Graphics 3D (integrated)
Sound: AC '97 Audio
Network: 10/100Mbps built-in Ethernet
Modem: 56K ITU v.92-ready Fax/Modem
Peripherals: Premium Multimedia Keyboard, 2-Button Wheel Mouse, Stereo Speakers
Ports/Other: 6 USB 2.0 ports (2 on front), 1 Serial, 1 Parallel, 2 PS/2, Microphone-In & Head Phone jack on front, Audio-In & Out, 3 PCI slots (2 available)
Dimensions: 7.25"W x 14.125"H x 16"D

[Black Magic]

How much more power exactly is the new PSU giving out?

[Hybr!d]

When power supply's blow they sometimes take the motherboard down with them.

If you are 100% the new PSU is not faulty and it is connected properly I would say the motherboard is dead.

[thingie2]

Have a check over all the power connectors first, check you plugged in everything you should have, if you have checked them, and they all work, then the powersupply blew the Motherboard.

[tomthedrummer1992]

This may sound simpole - but is the power switch which is on the front of the computer, connected properly to the motherboard? If it's on the wrong way round this could be the problem!

Sounds quite likely as the power light is always on and the computer itself won't turn on.

[RSteph49]

Unfortunantly that's not it, I thought of that too and tried switching it. Still didn't work.

[tomthedrummer1992]

Hmm. And everything is plugged into the right places?

Is it possible you can try the PSU in a different computer just to make sure it works?

[Carbon]

"Roughly" is sometimes not good enough. Old PSU may have 20 pin, motherboard might be 24-pin, etc. Check for empty sockets.

[RSteph49]

I've actually stolen the Power Supply from a computer I just replaced, so I know the power supply is good, connections are all good, and the power switch is plugged in properly. Unfortunantly, unless someone has a magic wand for me, I think I've eliminated everything I know of other than the motherboard is dead.

[thingie2]

If you've changed the PSu for a known good one, and everything is plugged in properly, the only option left, is that the Motherboard blew when the PSU blew.