Power Supply Replaced, Now No Monitor Signal

Hi. My daughter was playing a computer game during a storm (I was gone, I had no idea!) and the computer suddenly shut off. It had blown a fuse in the surge protector and the power cord smelt hot and had a place burnt on it as well. I replaced the surge protector and the power cord and plugged it into a different outlet and the computer would come on (even connect to the internet if I so desired and everything on the hard drive was intact) and then it pop off after about 1 to 3 minutes. It then wouldn't come back on unless I unplugged it and then plugged it back in. I noticed the fan on the power supply wasn't turning so I replaced the 200 watt power supply with a new 300 watt power supply. Now the computer boots up, the lights come on, everything sounds like it should, but I am getting no signal to the monitor. The monitor light stays on stand by.
I've tried taking out my RAM and reseating it in different slots. No go.
Help!
Could it be the video card or the motherboard? Let's hope not.
I'm trying a different monitor cord after work today.
Thanks in advance
Judy

When you are booting up do you get the one good beep from your computer saying everything POSTed OK? If so this generally means that the problem lies outside of the case...

First, try a different monitor. Something in it may have been blown out without affecting the little power light. My guess is the input stage was blown by whatever surge you had. Or the power input was blown out. Or the cord is bad....

Then check the video card. But I doubt your computer would boot if the video card were blown out.

Then consider a new motherboard if the previous two steps don't work. Again, though, I doubt your computer would boot if the motherboard were bad.

it beeps that one time, acts as if it's booted up, it's just nothing showing up on the monitor. The monitor acts as if the computer is not even on.

The monitor worked before I switched out the power supply though. That's what's weird.

It's your CPU,

pop in a new one and you'll have a display, if you know they type and speed and you have limited knowledge i would advise you get a matching CPU from ebay to try it, no need to change settings then, if the CPU is less than 1GB i would probably look at a motherboard and chip now you have a 300W PSU, good time to upgrade.....

and then.............. get your kids there own little PC..


Neil

I tend to think that if your computer POSTs the problem is not the CPU.

Did you try the monitor power cord? Did you try a different monitor? What have you tried?

Go through the process of elimination to figure out what the problem is before you go buy anything.

Now I'm really confused. I put my old power supply back into the computer and it now WORKS (before the fan wouldn't turn) but the computer doesn't recognize the monitor or the keyboard. I've taken both and replaced them with monitors and keyboards that I know *do* work and they still are not recognized by my tower.

I think it's a problem where they connect into the motherboard and I need a new motherboard.

Blah.

I assume you tried the monitor that you know works with the new power supply as well? Do you have another video card sitting around, or even that you could take from another computer? Its possible for that card to be out without keeping it from POSTing. How do you know that the keyboard is out if you have no monitor display? No lights?
Overall though, it does sound like a problem with the motherboard.

Hi, newbie here so take my opinions with a pince of salt. If the graphic card was at fault wouldn't the motherboard sound one long beep followed by 3 short beeps?, which it doesn't seem to be doing in any of the situations that have arose.

Most likely correct. However, computer components have a way of never failing quite like you'd expect. Its possible that the card could be busted w/o being gone enough to cause beep codes and failed POST. Thus, its always best to try other components rather than relying on beep codes to tell you if something is wrong.

Exactly the same thing happened to me. My daughter was on the PC during a thunderstorm when it shut down. It worked occasionally after that, but only with a different monitor, sometimes my keyboard wouldn't work so I had to plug in another. Then the modem packed in and I changed it for a new one, that wouldn't work either. I called in the experts. Cost me a packet. He replaced the Motherboard and the chip.
All fine now. The guy said something about static as he was writing out his bill but I didn't take much notice. I was too busy counting out my spare cash.
Hope you're fixed now.

hi im new on the forums i have the same broblem but my broblem starrted when i was cloking the grafick card 96000se some times it works and the peep comes but now it dosnt any more i have tryed to change grafick card and it dint work and theres nothing wrong whit my grafick card becouse my friend tryed it and it workt and i tryed 5 different memmory sticks and nothing ...

Give details, and use proper spelling and punctuation.