I have an Emachines ET1331G-07w here that gives one beep upon start-up, gets to the eMachines logo screen, and then hangs. Switched out the RAM, tested the power supply with my testor and it tested ok. I switched power supplies anyway, to no avail. I took the hard drive out and put it in an external SATA dock; had no trouble reading files. Only thing else I can think of is the motherboard, but don't know why it would post and get to logo screen if mobo was bad. Anyone have any ideas? They would be greatly appreciated.