Flash Sequence Of The Diagnostic Led Indicator - DEC Personal DECstation 5000 User Manual

13.6 Understanding the Powerup Self-Test Sequence and the LED Display
Figure 13–2 Flash Sequence of the Diagnostic LED Indicator
(POWERUP)
30 SECONDS
(INITIALIZING FIRMWARE)
(VIDEO COMES ON
AT THIS POINT)
30 SECONDS
(POWERUP SELF TEST)
NORMAL
POWERUP
SELF TEST
2 SHORT LED FLASHES
(see Table 13 4)
LED STAYS OFF
FOR LESS THAN
30 SECONDS
BEFORE...
1 LONG LED FLASH
FOLLOWED BY EITHER:
1 short LED flash, or
2 short LED flashes
(see Table 13 5)
LED STAYS ON
(see Table 13 6)
TEST COMPLETE
Troubleshooting
ERRORS
DETECTED
LED STAYS OFF
(see Table 13 4)
LED EXHIBITS A
SERIES OF CONTINUOUS
LONG FLASHES
(see Table 13 5)
LED STAYS OFF FOR
MORE THAN 60 SECONDS
(see Table 13 5)
Troubleshooting 13–11