Functional Unit Troubleshooting; Intermediate Configuration - HP 9000 Series 310 Service Information Manual

6. Repeat steps 4 and 5 until the bus expander's accessory card passes self-test. If the
accessory card does not pass self-test, either the accessory card or the bus expander is
defective. In this case, repeat steps 6 and 7 using another accessory card.
Before you can proceed further, the minimum configuration must work. If this configuration
works, then you can proceed to the next level, Functional Unit Troubleshooting.
Functional Unit Troubleshooting
A functional unit is one that passes the minimum configuration test. It doesn't have to function
properly, but at least start the self-test and light the LEDs for the computer. For the bus
expander, one accessory card must at least pass self-test.
For the computer to pass the minimum computer configuration functions correctly, the LED's
should end up as:
••••••••
Once the cornputer minimum configuration self-test passes, you're ready to start testing with
an Intermediate Configuration.
Intermediate Configuration
There are several ways to configure the computer for intermediate level troubleshooting in Func-
tional Unit procedures. A good place to start is by having memory configured to address at the
top of RAM. This will verify that more of the processor board is working. The procedures are:
1. Turn off the computer, unplug it, and reconnect the ribbon cables to the backplane.
2. If required, install a memory card configured for the top of RAM.
~t
Plug the computer in, turn it on and watch the LED's go through self-test.
4. If the LED pattern is correct, skip to Step 6.
If the pattern is incorrect, either the backplane or the processor is bad. Power down and
relocate the melllory card in another accessory slot, then retest. If necessary, run the test
with the rnemory card in each accessory slot.
5. If the LED pattern is correct, skip to Step 6. If the pattern is incorrect, either the
backplane or processor is bad. Replace each one and retest until the correct LED pattern
is achieved.
6. Power down and unplug the computer. Install a video board and connect it to a monitor.
Turn on the n10nitor.
7. Turn on the cornputer. Watch the self-test display on the monitor.
Troubleshooting
109