“Alert! memory error

Start by unplugging the system, remove the base cover and disconnect the battery from the system board.  Hold the power button for 30 sec.

Remove and reinstall the memory module(s).

Reassemble the system and power up -- if the problem persists, try one memory module at a time in each socket.  If one module fails in both sockets, replace it with a new one.  If both modules fail in one socket but not the other, replace the system board.