User`s guide

System Troubleshooting and Diagnostics
5.3 Power-On Self-Test (POST) and ROM-Based Diagnostic (RBD) Failures
Table 5–4 shows the various LED values and console terminal displays as they
point to problems in field-replaceable units (FRUs).
Table 5–4 KA52/53/54 Console Displays as Pointers to FRUs
On
Error
Hex
LED
Normal
Console
Display
Default
Action on
Error
Failing
Test
Number Test Description FRU
1
Power-Up Tests (Script A1)
F None Loop None Power up 1, 4
E None None None ROM code execution begun 1, 4
D None Loop None Wait for power 1, 4
B 72 Cont 9D Utility 1, 4
B 71 Cont 42 Chk_for_interrupts 1, 3
9 70 Cont 35 B_Cache_diag_mode 1
B 69 Cont 33 NMC_powerup 1
B 68 Cont 32 NMC_registers 1
B 67 Cont D0 V_Cache_diag_mode 1
B 66 Cont D2 O_bit_Diag_mode 1
B 65 Cont DF O-bit_debug 1
B 64 Cont 46 P_cache_diag_mode 1
9 63 Cont 35 B_cache_diag_mode 1
9 62 Cont DE B_Cache_tag_debug 1
9 61 Cont DD B_Cache_data_debug 1
9 60 Cont DA PB_Flush_cache 1
8 59 Halt DC NO_Memory_present 2, 1
1
Field-replaceable unit key:
1 = KA52
2 = MS44
3 = Q22–bus option
4 = System power supply
5 = SCSI device or 2 devices with same target id
6 = ASYNC option board
7 = COMM option board (SYNC)
8 = SHAC option board
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5–44 System Troubleshooting and Diagnostics