IBM 4247 Maintenance Information page 205

T&D04 - Microcode Test
Note: Not available in Model 003.
Display:
T&D04 Microcode Test RUN TEST ? YES END NO
Note: The message TEST RUNNING will flash during the test.
If an error message is displayed, go to "T&D Error Messages and Actions – Models 001, 002, and 003" on
page 231. The test completed successfully if the display advances to the next test number.
T&D05 - Operator Panel LED and Key Test
Display:
T&D05 Operator Panel LED and Key Test RUN TEST ? YES END NO
1. All of the LEDs will switch on at the same time.
2. Next, beginning at the top, each LED will flash once (except for the power LED which will remain lighted). An
audible alarm will sound.
3. After the LED test, the following message will be displayed:
PRESS KEY 1 -->
4. The key is good if the display advances to the next key number.
5. Press key 1 (shown below).
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Chapter 2. Diagnostics