help! getting nothing at all from the monitor

[keakar]

help! i'm getting nothing at all from the monitor and want to be really sure of what parts to replace.

this is a socket 478 P4 northwood 2.66ghz computer so its very old.

i have a customers computer with nothing showing up on monitor, no picture or anything from the monitor.

it gives no signal notice if unplugged but nothing at all otherwise.

all drives power up fine and activity lights are flickering, all fans working.

tried swapping out to a new known to be working video card and still nothing on the screen.

tried putting the video card it had into another computer and it wouldnt work so the video card has to be bad but something else is still screwed up.

im guessing the board is bad but im not sure, the psu tested ok and voltages look ok so before i go and buy another motherboard i want to know how i can be sure its not the cpu? (i have no other boards to try the cpu in)

i tried running the cpu for a minute without the cpu fan and can feel the heatsink was getting warm so it is putting out heat for whatever that may indicate.

i dont want to buy parts for something this old unless im sure about it because you cant resell a 478 board.

 

[DrunkenMafia]

I gather you have tried different ram also Keaker?? And you have cleared the cmos etc...
If the Gfx card was bad it could well have been a voltage spike or something similar which may have also taken out the cpu...

But like you say there is no point buying new s478 stuff. Can you grab an old board of ebay or something??? Or maybe drop the cpu into a pc shop and see if they can test it.

 

[hat]

My first bet would be the port you are plugging the graphics card in. When I fired the AGP port on my old Intel D865PERL motherboard, that's what I got.

In loving memory...

 

[keakar]

I gather you have tried different ram also Keaker?? And you have cleared the cmos etc...
If the Gfx card was bad it could well have been a voltage spike or something similar which may have also taken out the cpu...

But like you say there is no point buying new s478 stuff. Can you grab an old board of ebay or something??? Or maybe drop the cpu into a pc shop and see if they can test it.

no i havent tried different ram because its not even posting and it should at least post even without any ram so i didnt bother with the ram.

the customer wants to fix it for email and web surfing only so i need to buy something to fix it but i need to be sure i buy the right parts. if i bought a board and it turned out to be the cpu i'm screwed.

no i dont have any way to test the cpu (no pc shops around here) except to see if it starts to get hot without a fan and it does so it must be doing something.

 

[keakar]

My first bet would be the port you are plugging the graphics card in. When I fired the AGP port on my old Intel D865PERL motherboard, that's what I got.

i dont understand your post ??????????????????????????

did you mean to say fried instead of fired? "When I fired the AGP port"

did you mean to say slot? "My first bet would be the port"

 

[hat]

Yeah... slot, port, same thing to me.
Yeah I ment to say fried.

 

[sneekypeet]

is there a place for a mobo speaker ...could possibly get a post code that way to help track it down!

 

[keakar]

is there a place for a mobo speaker ...could possibly get a post code that way to help track it down!

its got a speaker but im getting nothing no beeps but when i tried my video card in it, it gave a cant find video beep code and fried my video cards onboard fan circuit so now MY card is damaged and needs the fan to be hooked to an adapter and plugged into the molex for power

i think i need to order a new motherboard with built in grafics, but before i do does anyone have any reason to believe the cpu could be bad?

 

[keakar]

ok then, i just wanted a little reassurance i was diagnosing this thing correctly.

i will go ahead and order him the new motherboard with onboard video.

 

[keakar]

just to finish up, here is the result.

the video card was bad and needed to be replaced

the motherboard was also bad, it looked like the northbridge failed.
(traces from it to the AGP slot were very dark but not actually burnt)

i replaced the motherboard with one that had onboard video and its working fine now.

i know onboard video sucks but this was a web surfing, files and documents only computer.

thanks for the help.