I used to always be working on computers whether it was building, repairing, etc. I recently took on the job of refurbishing some machines that were donated to a local non-profit organization. There were several machines, all from the same place with the same operating system and everything. Heres the problem: I cant get one of them to POST. When I power up, all the fans come on, things are sounding normal EXCEPT there is nothing on screen. I did notice that with the other machines, they were in a "quiet boot" mode. When the machines came up, it went straight to a splash screen, then would go into windows. There was no post sounds on the other machines. So my problem is I don't know where to start, I have checked the video card and exchanged it with another card I had. I also exchanged the hard drive. I have not changed out the power supply yet, and I don't have another processor laying around. (well I do, but not the right one) Does anyone have any ideas? It has just been so long since I have done this, I seem to have forgotten everything I used to know.