crwdns2934241:0crwdne2934241:0 mayer

crwdns2934249:0crwdne2934249:0:

Frankly, it's seldom the logic board.  Check this guys Google rating.

This sounds more like a hard drive or system corruption issue or possible virus.

Boot into the repair partition and run Disk Utilities.  To do that hold down the option key on startup and select the repair drive.

crwdns2915684:0crwdne2915684:0:

open