I have an HP Pavilion m8200n. My old motherboard was fried (lightning, grr...) so I replaced the motherboard to an ASUS M4A785-M.
Everything has gone well, except for the front panel connector (I had a 9-pin, the new mobo is 20-8 pins.) I've put it on there so that the Power On/ground is working well, but that's not the problem...
Now that I have turned on the computer, the screen is scrambled, and it appears I have to setup the BIOS (which isn't a problem).
I've checked all the cords and replugged them all in. Not sure how to fix this issue... it seems like a graphics problem, and not a motherboard problem?