Motherboard is main for a computer and when it get a problem such a deadly situation to face. Motherboard problems range from shutdown and startup problems.
Problems with mother board can be like computer won't shut down, repeatedly shuts down and restarts, suddenly reboots, freezes, etc.
This can be caused due to BIOS battery problems, power supply connector compatibility problems and problems with any external devices connected to motherboard circuit.
The main thing is troubleshoot the problem before replacing it, this will save you some money. For the efficient repair of mother board, where ever you are in the US, we serve you better!