Hardware

is actually usually a replacement. You may be able to get it done under warranty from Gateway if your machine is under warranty.

Is your keyboard PS/2 or USB? One thing to try would be using a different keyboard that uses a different port. So, if you are using a PS/2 keyboard, try a USB one or Vice Versa. It could be that the mobo is ok, but that port has gone bad. (Additionally, if you are already using a USB keyboard, try a different USB port).

look for local computer repair shops which can fix PCBs. You can have a look yourself, as one of the most common board failures are capacitors going bad. If the caps are bulging, or if one is leaking something, or looks burned, a capacitor replacement would fix the problem (hopefully).

Make sure you get a decent PSU with enough power, since you are trying that first.

Thanks All, I wanted to add one more note. Sometimes when I turn the power on, the LED comes on and everything powers up, but stops at the gateway screen. But then When I power down and power up again, the LED will not come on, and just the fan turns on. And I have to unplug the power cord, and try a couple of times before it fully powers up again. I just wanted to add this in, to see if anyone had any other ideas.

If you unplug the mains and press the ON Button for about 10 seconds it will discharge the Internal Capacitors and if it starts then the Filter Capacitors in the Power Supply have gone off. You need to replace the Power Supply if that is the case here and I would suggest a Good One instead of what Gateway supply.

Something like a Antec

http://www.antec.com/Believe_it/product.php?Series=MjQ=

Corsair

http://www.corsair.com/products/power_supplies.aspx

Gigabyte

http://www.gigabyte.com.tw/Products/PowerSupply/Default.aspx

Would be the way to go here.

Col

He knows what he's talking about, and it does sound more like a PSU issue that way.

I was hoping OH Smeg would post as he always has a list of the good PSU vendors.

Smote, you know.

Last night I replaced the psu with a corsair,but for some reason Im still getting the same problem. When I turned it on the first time I got no LED, but the fans turned on. Then I unplugged the power, held down the power button and plugged it back in, and the LED lit up, and so did my keyboard. I was able to get to the BIOS settings. Which I looked through and everything seemed fine. So I exit the settings and it goes right back out to the gateway logo, and freezes. So I power it off and back on again, it comes up, but now wont power the keyboard on. This computer is a Gateway GT5242E. I'm really not sure what to think now. Im also still getting the fans only coming on and no LED on the power button, until I cycle the Power. Once I do this I normally get the LED back, but even then sometimes the LED comes on, but it will only start one fan. Any Ideas?

to fully power your system, then we, I believe, are back to damaged capacitors on the system board.

You can try to look for them yourself, as describe twice in this thread, or just take the board to a repair shop (you will have to do this to have any bad caps replaced anyway).