If there are faulty RAM chips in your system, you see one of these messages:
If an I/O or parity error occurs, you see one of these messages:
Parity check 1
Parity check 2
The program also displays the number of the segment causing the problem.
Keyboard Controller and Keyboard CheckThe computer checks the keyboard controller and keyboard for problems such as failure of one of the keys to release. If there are any errors in the connection between the keyboard and computer, you see this message:
When this message is preceded by a number (XX), the number represents the key (in hexadecimal) that is the source of the error.
If another failure is found, you see one of these messages:
The computer next checks the video and video controller. If an error occurs, you see this message: