Digital Equipment VAXstation I Service Manual page 86

MAINTENANCE
Table 3·11: Troubleshooting Flow (continued)
- . - . . . -+· - ...... - . . . . - - - - - - - - . . . - - .... - - - . - - ....... - - .... - - ... - - - - - - •• - - ·+- - .... - - -
STEP !PROCEDURE/DECISION
I
BRANCH
- - •. -+- - .. - • - ... - . . . - - - - - - .. - .. - - .... - .... - - - - - - .. - .... - - - - - .......... - .... ·+·. - - - - -
20
Boot diagnostic diskette.
Will Macroverify or other dia9nostics load?
Load and Run Macroverify.
Did Macroverify find failed FRU?
Replace FRU.
Return to START
21 Run applicable device diagnostic.
Replace FRU.
Return to START
N
•>
27
N
•>
21
22 Will any (other) device boot? N
•>
23
Replace boot unit, then RQDXl.
Return to START
23 Possible interrupt or 022·bus fault.
Replace OAP for interrupt fault.
Replace MCT or backplane for Q22·bus fault.
Return to START
24 Is following error message true? Y •> 27
UNEXPECTED SCB EXCEPTION OR MACHINE CHECK
Is one of following error messages true?
NO VALID BOOT DEVICE IS PRESENT IN THE CONFIGURATION
NONE OF THE BOOTABLE DEVICES CONTAIN A PROGRAM IMAGE
PROGRAM IMAGE NOT FOUND
INVALID BOOT DEVICE FILE STRUCTURE
PROGRAM IMAGE FILE NOT CONTIGUOUS
FILE CHECKSUM ERROR
BAD FILE STRUCTURE HEADER
BAD VOLUME DIRECTORY
INVALID PROGRAM IMAGE FORMAT
PREM\TURE END OF FILE
UNEXPECTED EXCEPTION AFTER STARTING PROGRAM IMAGE
Suspect media.
Try to boot from another media.
Return to START
3-32
N •> 27