Somethings broken --- all out of ideas
 

Ok heres the problem my monitor says no signal. I know this means that maybe its connected bad or whatever but I've tried three different monitors, 2 video cards, switching motherboards and getting a new power supply. I am all out of ideas and i dunno what else to try. I know its not the monitor because I have 2 computers and I tried it in my good one and it still said the same thing. The new motherboard had new ram. cpu etc. The only wierd thing i notieced was when i took apart the old comp the ATX Power cord had 2 brown spots inside where the connectors are like it exploded or something and same on the old motherboard.

But anyways I dont know what else to do any help is appreciated.

Can you clarify? On the one hand you say that the monitor gives you a "no signal" message on two different computers? Then you say that you know it's not the monitor ... Have you got a working system at all?

If you switched all that out, there has to be something in common. Two totally seperate systems giving the same error? There has to be some component, some connector, some cable that is in common between the two.

monitor cable could be damaged... might not be too hard to splice a new one on to it... havnt tried... so i wouldnt know...

Sounds like you've got a collection of toasted components. If your PSU has "brown spots" on it...it's probably been blown. Even if it turns on, it's probably not delivering the appropriate voltages/currents anymore. Whatever motherboards and peripherals in those motherboards that have been connected to that power supply probably got toasted too. Try your "newer" motherboard/CPU/RAM and a new PSU.

but i changed all that out to a motherboard that i know was working because i took it out of my good computer. Nothing on the motheboard that is there now could have been fried because its ac ompletly different motherboard with different components the only things that are the same where the video cards and I tried different video cards. As for the no signal thing on the monitor well it says that when i plug it into the monitor i am using now...

did you continue to replace components after you did the motherboard swap? You should continue replacing parts until the system starts working. For example:

1. replace PSU. If system still doesn't work right,
2. remove all cards/peripherals from motherboard, including memory and CPU. Does system give any beep codes when turned on?
3. If you get beep codes, start adding components back to the board one by one. Start with the CPU, this should change the beep codes you get. Then put the memory back in, this should change the beep codes again. Finally, put the video card back in. Wherever the system quits working in this process is a dead component. Replace that component and continue building the system.

4. If you don't get any beep codes with a bare motherboard, then you've either got a dead PSU or a dead motherboard. Just because a PSU turns on doesn't mean that it's functioning properly.

I've seen some very strange things cause systems to refuse to POST. Everything from bad modems or sound cards, to toasted hard drives.

The individual wire that goes from your power supply to your mobo that supplies power to your AGP or PCI slot may be damaged. I'm with the guy who told you to try a new power supply.