My T42 won't boot. The system is in new condition, almost no hours on it. I bought it on Ebay a couple of years ago. I used the system on and off for a couple of months, then one day it would not come out of standby; it shut down on its own. After that I could not boot the system at all, I tried everything. After sitting for a couple of months it fired up and ran for hours just fine until I shut her down; then I could not boot again. Called Lenovo they said its the system board and I need to replace it. Any other ideas or helpful thoughts. I don't feel its worth replacing the mobo for $400 or more. Maybe someone can get me a mobo for cheap, TYPE 2378-REU. Please help, thanks.