Sounds like a fresh install is warranted or you can see if you can restore to an earlier point? What happens when you tap the F8 key while booting and try to boot into safe mode?
If it isn't hardware I could fix it if it was infront of me, long distance repair is quite a bit more difficult though.
If it isn't hardware I could fix it if it was infront of me, long distance repair is quite a bit more difficult though.