Power up fan runs no keyboard,mouse or monitor

I have a Gateway Gt5235E Meda Center running Windows XP SP3. About a week ago I got little blue note cards running from corner to corner with a blue line about half an inch wide through them . All Icon disappeared keyboard and mouse stoped working power button would no work . So I had to turn off the power by pulling the plug. When I turned it back on the Monitor would not work no lights on the keyboard and no mouse.
The only things that were working were the cooling fan for the CPU and power supply fan.
At first I though I had some type of virus. So I placed the harddrive in my old Gateway and ran many different scans . Malwarebytes showed nothing. So a friend told me about drweb that found 5 backdoor trojans . Placed the hd back in to the pc and still nothing works.
As for the monitor, keyboard and mouse they work fine on the old pc. And power switch dose not work.
The motherboard in question is a FIC K2BC51 LF with Nvidia GeForce 6100 chipset.
Now I am not sure if I should replace the motherboard or if the problem is something in the power supply.
I have heard of motherboards that have fuses but don't know if this one dose.

 

when you say power button would not work did you hold the power button in long enough for the PC to switch off 4 - 6 seconds. This is a relatively safe method to turn a frozen PC off without damage, pulling the plug is a very risky one.

 

Thank PeteC
Will try replacing the battery.
Hawk22 I know but you can hold the power button all day and it still will not work.

 

And that, to me, would indicate a PSU failure, though personally I always thought that would just cut the PC, unless that's a total failure...

 

Took out the old battery before I went to work this morning and tryed a new one tonight still the same there is no beep to tell me I need to reset the date and time. Nothing works.
So I would say its the mobo. Now comes the big question should I replace the processor when I replace the motherboard. OR should I take it to some one who knows more and let them run test on the computer to make sure it is the motherboard.

 

jabfarm, I would follow Pete's suggestion about PSU. I've had experience with NEW PSU that ran OK for 2-3 months then half ran the PC. then would start the PC with black screen and fans going. I was lucky I had the old PSU which I reinstalled and all was OK. I RMA'd the faulty PSU to the suppliers who replaced ti with another which only worked for a day!!! Naturally I returned it and demanded money back and the comp is still working with it's original PSU. We can check PriceSpy for comp parts, but you can pick up known brands for about $60-70.00 for 400-500Watt output PSU's. Just make sure whether you require 20 or 24 pin connector type. Also from a current experience my CPU packed it in with similar indicators. Fans, LED's all working but no POST and black screen on monitor. So do your diagnosis with PSU first as Pete suggested.Neil.

 

Will then I will have to purchase a new power supply unit. Before I placed this post here I checked in to doing just that and found they start out at $39.99 to $51.99 . The power unit in question is a Beatec
Model ATX-300-12E REV.DR
input 100-127v-6A 200-240V-3A 50/60Hz

 

PeteC
Well then I will need to find someone to check the PSU for me.
Thanks for all the help.

 

PeteC
The PSU was bad and I was told to purchase a new one from Gateway.
For they check the model number and your seiral number to find the one that was installed on the computer.
New PSU is in and there is no change. I still have no monitor, keyboard or mouse.
What would be the next thing to check or have checked.

 

If your ram is OK and you get no post when you start up, that does not sound good at all. The Motherboard could well be the sore point here.
But as Pete states and your PSU was a good example for it the same could apply for the Motherboard, and you really would have to consider the cost of the exercise of that.

 

Mouse is USB and lights up when on. did not light up. Try keyboard both ways and there is no lights . tryed it hooked to PS/2 and also tryed it using PS/2 to USB port adapter.(need for older computer ps/2 port bad)
As for the ram it was replaced two years ago.
HD runs on old pc only problem is old computer is Fat32 and new computer is NTFS.
Will try what PeteC has above .

 

Ran HD check using windows verison and no problem there . Tryed with all extra's disconnected and still the same.

 

You might expect, but I know for a fact there was a memory issue with my previous PC, and it didn't beep...

 

Well even if it is the memory how would I check it? I know memtest will run but with out the screen I will not know if anything is bad, And the old pc is different so there is no checking it that way.

 

Unfortunately, you are stuck somewhere between a rock and a hard spot. You just replaced the PSU and I know that cost some money but you've now probably shot $50 for a $20 PSU - another 300W Bestec which isn't going to do you much good with anything other than your old machine or something similar. From the sound of it you have about 5 years on that machine and based upon the symptoms, it appears that your motherboard has seen better days. It isn't worth putting a lot of money into a repair unless you can pick up a motherboard on ebay for $20-30 - You'll find a replacement motherboard from Gateway will cost you in excess of $200.

Sorry to break the news this way but you can get a better machine (factory refurbished) with a warranty and XP Pro for less than $150. I don't think its worth trying to fix what you have. Take a look at refurbs over on Computer Geeks.