Understanding DECsystem 5100 Self Test Failure

When I power up my DECsystem 5100 I get the output shown at the end of this email. I thought this was to do with the DS1287 chip as it seems be an NVRAM battery error (perhaps). Since I know these devices fail I took out the DS1287, put in a socket and then bought a replacement DS12887A. But I still get the same problem. It could be that I bought a bad replacement, or that I have done some damage in my desoldering of the original, or it could be that the error is something completely different. In fact the Maintenance Manual suggests test 9 is to do with the DZ, and I can't find what test 4 relates to. Does anyone know what this failure is if it isnt' the DS1287? Is there an easy way to test a DS1287? Regards Rob 26..25..24..23..22..21..20..19..18..17..16..15..14..14..14.. 13..12..11..10..09..?45a nv ba?45a nv bat ?45a nv ba?45a nv bat ?45a nv ba?45a nv bat 08..07..06..05..04..?45a nv bat 03.. ?45a nv bat ?45a nv bat ?45a nv bat ?45a nv bat ?45a nv bat ?45a nv bat KN230 V1.4 08-00-2b-27-04-50 0x800000 hardware: revision 1 firmware: revision 5 cpu: revision 2.32 fpu: revision 3.32 security switch: secure mode password: clear eeprom: valid ethernet hardware address: 08-00-2b-27-04-50 option board: not present memory: total size 8MBs bank0 4MB SIMMs size: 8MBs 0 bad pages scsi peripherals unit type product removable/fixed capacity 7 host adapter