Table 5-2. Minimum Functional System - HP 330 Service Information Manual

If the self-test display is correct, skip to Step 12.
9. Power down and unplug the computer. Install a video board and connect it to a monitor.
Turn on the monitor.
10. Turn on the computer. Watch the self-test display on the monitor.
11. The display should be correct and reflect the total memory in the computer,
If the self-test display is correct, skip to Step 12.
If the self-test display is incorrect, the monitor, processor or video board may be defective.
Replace these and test as required to get the correct display.
12. Turn the computer off and install the system interface board, then install the keyboard.
13. Turn the computer 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 System. If the response is incorrect, go on to Step 11.
14. 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 Minimum Functional System, the following hardware must perform the indicated
functions as shown in Table 5-2.
Table 5-2. Minimum Functional System
Assembly Minimum Functions Performed
Power Supply All voltages normal and within specifications.
Processor Board
CPU chip executes self-test, cycles memory, most instructions
executed OK, self-test LED light.
4 Mbytes of RAM
Addresses, read/writes, and refreshes.
Video Board Processes and outputs video.
System interface board.
Inputs/Outputs data between processor and peripherals.
Monitor
Displays 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 tests in the Series 200/300 Test Tools Package. Refer to the Test
Tools Manual for tests information such as:
• Minimum Hardware Configuration Required.
• Test Loading and Running.
• Interpreting Test Results.
Series 300 Model
:~30/350
Test Tools are explained in the next section.
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Troubleshooting