Have you tried unplugging your CD Drive from the system and booting it? Try that and see if it boots. If it doesn't and still has no screen it may be your GPU.
If the sound persists even after you disconnect the CD Drive, check your fans.
Just a thought too, it could be the PSU not being able to push that much power out but normally it wouldn't die then freeze the system. It would die and your PC would shut off.