I bought some broken s2's from eBay to replace the motherboard in mine, well one of them had an ok screen so I took another motherboard from one of the other ones and replaced it. Phone turns on, I can get into the recovery menu, but when I go down to factory reset and push the power button to accept that option, nothing happens. Same with any of the other options. I have to pull the battery to restart it. But if I start the phone normally, the power button works just fine. Does anyone know of a fix for this?? It has a lock on it so I can't reset it from the settings menu.