Ok so I just got this 360 that was RROD and Sometimes it will boot to the dash but most times it will turn on and do nothing no video no sound. The ring stays off but the power light comes on . A few times is would half boot and freeze while the logo was coming on the screen.

This is with 2 different power supplies plugged directly in the wall . There are no controllers or peripherals connected. You can open the drive and put in a disc and it will spin up like it's reading it. Any ideas?