Wild guess: Your battery (that keeps the internal clock running when no power is supplied) is dead.
Thing to try: Poke around inside the BIOS and see if it has a log of its POST errors. (Or if it beeps on boot, the beeps may be a code for what error it’s getting.)
Wild guess: Your battery (that keeps the internal clock running when no power is supplied) is dead.
Thing to try: Poke around inside the BIOS and see if it has a log of its POST errors. (Or if it beeps on boot, the beeps may be a code for what error it’s getting.)