HP 9000 Series 310 Service Information Manual page 120

8. The display should be correct and reflect the total memory in the computer,
If the self-test display is correct, skip to Step 9.
If the self-test display is incorrect, the nlonitor, processor or video board may be defective.
Replace these and test as required to get the correct display.
9. Turn the computer off and install the HP-HIL interface and cable, then install the key-
board.
10. Turn the cornputer on and observe the self-test display. Check the keyboard to see if the
self-test sequence responds to the keyboard. If the response is correct, you now have a
Minimum Functional Systenl. If the response is incorrect, go on to Step 11.
11. If the response to the keyboard inputs in incorrect, the keyboard, its electronics, or cable
could be defective. Replace each until keyboard response is correct.
To have a Mininlum Functional System, the following hardware must perform the indicated
functions as shown in Table 5-2.
Table 5-2. Minimum Functional System
Assembly
Power Supply
Processor Board
One Memory Card
Video Board
Functions Performed
All voltages normal and within specifications.
CPU chip executes self-test, cycles memory,
most instructions executed OK.
Addresses, read/writes, and refreshes.
Processes and outputs video.
Keyboard and its Interface Inputs data that is processed.
Monitor Displays Self-Test information.
Once this level of operation is achieved, a similar process can be used to install and check other
accessories, interfaces, and peripherals in the complete system. This also may be a good point
to load and run one of the computer tests. Refer to the Test Tools manual for tests information
such as:
• Minimum Hardware Configuration Required.
• Computer or System Test Loading and Running.
• Interpreting Test Results.
Series 300 Test Tools are explained in the next section.
110
Troubleshooting