no signal

[marlety]

I have a big problem whit may computer over he weekend I canched the power suply inside the pcu and now the monitor give me this message MONITOR WORKING, CHECK COMPUTER, CHECK SIGNAL CABLE any ideas please
thank you in advance

[Will.Spencer]

This means that your monitor is working, but that it is not receiving a signal from your computer.

Is your video data cable plugged in firmly to the monitor and the computer?

Is your computer powered on? Is the power supply fan spinning? Are the LED's lit? Are the hard drives spinning? Is the CPU fan spinning?

Does your new power supply the same or more wattage than the old power supply?

[marlety]

video data cable is plug in, the power supply fan is spining, the CPU fan is spining but the hard drive is not and the new power supply is the same wattage as the old one.

[Will.Spencer]

So what do we know?

1. Your monitor is on
2. Your computer is on
3. Your monitor is not receiving a video signal from your computer

My next steps would be to:

1. Check the video cable for damage -- especially for bent pins.
2. Re-seat the video card.
3. Boot the computer and listen for any BIOS beeps.