Additional Spln Information; Self-Test - Digital Equipment VAXstation 3100 Maintenance Manual

54 Troubleshooting
A code of 0000.0001 (system exerciser) next to the 8PLN mnemonic indicates
no errors detected with the graphics module. Refer to Section 2.20.1.2 if any
other code is listed.
2.20.1 Addltlonal 8PLN Information
If
the monitor screen is blank after power-up (no display), check the video
cable, check the monitor for power, then check the LEDs on the back of the
system box for an error. If the monitor displays any part of a utility pattern
(gray scale (T 88) or 8-bar color bars (T 87)), then the problem is probably
on the 8-plane graphics module. Replace the 8-plane graphics module. H the
monitor is still blank after power-up, replace the system module. Troubleshoot
the monitor if the problem still exists. _Refer to the monitors service manual
for troubleshooting instructions on the monitor.
2.20.1.1 Self-Test
To
:run
self-test in Field Service mode, install the loopback connector on
the communication port, and enter TEST 4.
If using a monochrome
monitor, install the two 75-ohm terminators on the video cable's red and
blue connectors. Enter- TEST 4 at the console prompt>>>. If these 75-olun
terminators are not used, a hard readback error is generated for the 8-plane
graphics module (8PLN) in the configuration table.
To run self-test in customer mode. do not install anv looobacks. Enter TEST
4 at the console prompt >>>.
If
using a monochrome monitor, install the
two 75-ohm terminators on the video cable's red and blue connectors before
entering TEST 4.
H
these 75-obm terminators are not in11talled when using a
monochrome monitor, a status information readback error is generated for the
8-plane graphics module (8PLN) in the configuration table. After TEST 4 is
entered, the screen clears initially and then displays serveral. t. e st patterns until
the test is done. Display the con.figuration table (TEST SO) to see the error
code (8PLN). Replace the graphics module if any error code is indicated. If
the error still exists after replacing the 8-plane graphics coprocessor module,
replace the system module.
Appendix E contains a complete listing of the power-up and self-test error
codes.