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PROCBDUllB 2
Printer Port LED Check
1.
Turn the POWER switch off.
2.
Plug the printer port LED into the PRT (printer) connector
on the back of the unit.
3.
Turn the POWER switch on while watching the printer port
LED.
The printer port LED will light at the same time that the
POWER switch is turned on.
4.
Read the final LED status as a hexadecimal value from left
to right.
5.
If the final LED status matches any of the error status and
OK status values in the following table, go to PROCEDURE 5.
6.
If the final LED status is PBB , go to PROCEDURE 3 and
continue.
TABLE 2-3 Printer Port LED Error Status and OK Status
Test Name
Error Status
OK Status
BIOS ROM test
01H
11H
Timer (82C53) test
02H
03H
12H
DMAC (82C37) test
04H
05H
14H
RAM
PJW
test (first 16kbytes)
06H
07H
16H
PIC (82C59) test
08H
09H
OAH
OBH
1BH
Video RAM test
OCH
Display controller test
ODH
OEH
2-12
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