Appendix
255
III. Blank Display, Front Panel Lights ON, Rear LED flashing
ADDITIONAL CLUES
Confirm that all DIP
switches are up
PROBABLE ROOT CAUSE
NOTE:
On the Z850, the SDRAM
error codes will also flash on the
front panel error LED.
ACTIONS (follow in order)
SDRAM Error Codes (2-6) See page 29 in the
Phaser 840/850 Service Quick Reference Guide
for
more information.
1.
Condition started
after recent
upgrade.
A.
The Memory DIMM not
seated correctly.
B.
Connection problem with
code DIMM
C.
Unsupported or defective
memory DIMM.
D.
ESD damage to main
board.
1A.
Reseat the memory DIMM.
1B.
Reseat the Code ROM DIMM.
1C.
Replace the memory DIMM.
1D.
Replace the main board.
2.
Was working OK,
then failed.
A.
Connection problem with
code DIMM.
B.
Memory DIMM became
defective.
2A.
Reseat the Code ROM DIMM.
2B.
Replace the memory DIMM.
NVRAM Error Codes (9,10) See page 30 in the
Phaser 840/850 Service Quick Reference Guide
for
more information.
3.
Recently swapped
main board
(9 = NVRAM Chip,
840 only)
(10 = 8-pin Boot
ROM).
A.
NVRAM (840 only) or
Boot ROM socket empty
or chip has bent leg.
B.
NVRAM (840 only) or
Boot ROM defective.
3A.
Swap part from old board or
check for bent leg.
3B.
Replace with new part.
4.
Other error code.
Record here
A.
Depends on error code.
4A.
See page 29 of Error Code
topic in the
Phaser 840/850
Service Quick Reference Guide.
Summary of Contents for Phaser 840
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