Just replaced my PSU so to the old one getting toasted. Everything comes on but my monitor says no signal try a different monitor and plug still the same. Any ideas would be helpful.

What did you connect the screen to? Motherboard of gfx card?

Goes to motherboard.

Do you have a gfx card?
Check you bios settings or read the manual, this is some very basic problem I can't say whats wrong

There is a card in my PCI slot but for audio only.

My initial thought is just before your old PSU fried, the safety mechanism inside it that protects your motherboard from surges was taken out too and that's what caused the problem with your PSU. That could also have damaged your motherboard. Coming out of your PSU will be a big bulk of wires that lead to a large 12 pin connector to supply your motherboard with it's main source of power. How close is that 12 pin connector to the connector for your monitor?

@ Jack my main source has a 20 pin connector and is on the opposite side of the motherboard from the video input. My dad is bringing over an Invidia graphics card today so we will see what happens.