When I turn on my tower, nothing goes to the monitor (there's just a black screen). Sometimes, it starts up again after just a few seconds, and then it will sit there, fans blowing, for an indefinite period of time before I press and hold the power button to turn it off. I'm wondering why it is doing this. Sometimes it will turn on a couple times before doing that.
A few extra details to help:
1. It does this from cold, when I first turn it on in the morning or something
2. once after it did this, I came back 30-40 minutes later and tried again and it worked - I was even able to restart it and then turn it off, and then back on.
3. I just put in a new hard drive and installed fresh copy of Windows 7 pro on it in an attempt to fix the problem that was originally occurring, which was that it was turning on (it WAS showing the splash screen on the monitor this time), but it would pause at some point and do nothing.
Any help is appreciated