So I hooked it back to the LCD monitor and the sound issue has seemed to  fix itself. Maybe it was because it has been sitting for a few months with no use or what. But the sound issue is no longer a problem. However after that machine is turned on for the first time of a day it starts perfectly with any LC PSU installed. Turn it off, and then turn it back on in like a min or so and the computer wont start back up. I get a grey screen, no mouse pointer, no start up chime, no booting.

I can hear the fan and HDD spin but nothing else. If I turn off the computer for like five mins, then back on, it will fire up again with no issues. It will run for hours fine with no issues but when i turn it off and go to turn it back on I get the grey screen issue every time. The LCii works perfectly otherwise and it has a 500 mb. HDD installed in it. Any ideas what would cause this issue?