Intermittent problems refer to the problems occur only occasionally and are difficult to repeat.
Solutions:
Ensure that all cables and cords are securely connected to the computer and attached devices.
Ensure that when the computer is on, the fan grill is not blocked (there is air flow around the grill), and the fans are working. If airflow is blocked or the fans are not working, the computer might overheat.
If Small Computer System Interface (SCSI) devices are installed, ensure that the last external device in each SCSI chain is terminated correctly. For more information, see your SCSI documentation.