If anyone can help me with this I would appreciate it. I have a self built computer with a Seagate hard drive and an MSI mother board. It is just about 3 years old and has been working fine till today. I shut it down to install a wireless card. I didn't do any work to it yet and tried to start it back up again and it wouldn't start up completely. When you turn it on, the power light COMES on and stays on, the keyboard light comes on just briefly ( a lot shorter then usual), the hard drive runs contuously and both fans run continuously however, on the monitor I receive a "no input signal" and the light on the laser mouse doesn't come on either nor do the keyboard lights EVER come back on. I've tried to clean it out, disconnect the power supply and reinstall, checked all the wiring on the motherboard and inspected it for any burnouts and I cannot find anything. Has anyone had this problem before or have any ideas what is wrong? I would greatly appreciate anyones assistance.What's the name, wattage and age of the power supply? Does it come on at all? Do the fans spin?The power supply is a Mirage, 350W and it is only about 1 1/2 - 2 years old. The fans run just fine and it sounds like the hard drive is running the same as well.Take out the wireless card & reboot...what happens?

Alan <>< The wireless card was never installed. All I did was shut down the machine, I never put the card in because I hadn't installed the software yet, so I had to turn it back on and that is when I had the problem.Do you happen to have another machine you can swap that PSU into to see if it is the culprit ? ?

patio. 8-)Only USB devices require you to install the software before connecting the device.

Have you touched anything whilst the PC CASING was open?I never touched anything, plus I hadn't even opened the case yet. What are you thinking could have caused it. I have been thinking that it is the mother board. Its just kind of expensive to replace just to test.I don't have another machine to test the PSU, but I was thinking that since the fan and the hard drive are still running, the PSU might not be the problem. Could it still run the fan and hard drive, and not allow the computer to finish start up.The computer SIMPLY wouldn't start up anymore?

Inspect the motherboard to see if any of those round towers little towers of which I do not know the bloody name e are leaking a yellow fluid.

Also make certain all HARDWARE and cables are firmly seated.capacitors raptor. Finally.