Re-insert the diskette and secure the lock. If no errors occur, the menu reappears. An error occurs if the drive is malfunctioning, or if you do not remove or replace the diskette within a certain time.

Run All Above Checks

To run all the tests on the menu in sequence, press 6 and then Enter. When you choose this option, all checks for the diskette drive(s) and controller are performed automatically in sequential order. Although you do not start each test, you must still supply the appropriate responses to progress from one test to the next.

Math Coprocessor Check (80287)

Use this option to check the operation of the 80287 math coprocessor if you have one installed in your computer. To check the math coprocessor, select option 7 from the DEVICE LIST.

Before running any tests, the computer checks the settings in CMOS RAM to ensure that a coprocessor is installed. If the coprocessor is missing, or if you have not changed the setting in CMOS RAM with the Setup option, an error occurs and the test ends.

If the coprocessor is installed, the program then runs a series of checks on the precision with which the coprocessor performs calculations and handles exceptions.

Parallel Port (Printer Interface) Check

Use this option to test the operation of the secondary parallel printer port. For example, you would select this option to test the built-in port if you have assigned it as the secondary port, or if you installed an option card that provides a parallel port.

Performing System Diagnostics

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