Technical data

Diagnostic LED Codes, Continued
DSW21
Communications
Device LED
Codes
Table B–12 DSW21 Communication Device LED Codes (1100
XXXX)
LED Depiction Code Description FRU
1100 0000 C0h Comm option
code entered
DSW21, System
module
1100 0001 C1h Comm option
ROM test has
failed
DSW21, System
module
1100 0010 C2h Comm option
RAM test has
failed
DSW21, System
module
1100 0011 C3h Comm option
self-test has
failed
DSW21, System
module
1100 0100 C4h Comm option
Dual RAM
access test has
failed
DSW21, System
module
1100 0101 C5h Comm option
Dual ROM_
RAM access
test has failed
DSW21, System
module
1100 0110 C6h Comm option
Interrupt test
has failed
DSW21, System
module
1100 0111 C7h Comm option
Integrated
loopback test
has failed
DSW21, System
module
1100 1000 C8h Comm option
Reset test has
failed
DSW21, System
module
Continued on next page
B–13