[j-nsp] M20 fpc issue

[Joe Freeman]

Greetings-

I have an M20 in the lab that I need to get up for a couple of tests. I
realize it's an old boat anchor and isn't supported, but it's what I've got
at the moment. All I really need to do is some MPLS/LDP testing, which it
should be able to do.

I have Junos 12.3R1.7 running on this hardware build-
root at lab-m20> show chassis hardware
Hardware inventory:
Item             Version  Part number  Serial number     Description
Chassis                                22178             M20
Backplane        REV 07   710-001517   AL3655            M20 Backplane
Power Supply A   Rev 03   740-007311   506645            AC Power Supply
Display          REV 04   710-001519   AF4603            M20 FPM Board
Routing Engine 0 REV 01   740-016485   P13004103006      RE-4.0
Routing Engine 1 REV 06   740-008883   P11123901048      RE-4.0
SSB 0            REV 01   710-001951   AF2998            Internet Processor
IIv1
SSB 1            N/A      N/A          N/A               Backup
Fan Tray 0                                               Front Upper Fan
Tray
Fan Tray 1                                               Front Middle Fan
Tray
Fan Tray 2                                               Front Bottom Fan
Tray
Fan Tray 3                                               Rear Fan Tray


Notice the FPC's aren't showing up.... They are all offline, and I can't
get them to come online-
root at lab-m20> show chassis fpc
                     Temp  CPU Utilization (%)   Memory    Utilization (%)
Slot State            (C)  Total  Interrupt      DRAM (MB) Heap     Buffer
  0  Offline           27
  1  Offline           29
  2  Offline           27
  3  Offline           27

root at lab-m20> request chassis fpc slot 3 online
Online initiated, use "show chassis fpc" to verify

root at lab-m20> show chassis fpc
                     Temp  CPU Utilization (%)   Memory    Utilization (%)
Slot State            (C)  Total  Interrupt      DRAM (MB) Heap     Buffer
  0  Offline           27
  1  Offline           29
  2  Offline           27
  3  Offline          Absent

root at lab-m20> show chassis fpc
                     Temp  CPU Utilization (%)   Memory    Utilization (%)
Slot State            (C)  Total  Interrupt      DRAM (MB) Heap     Buffer
  0  Offline           27
  1  Offline           29
  2  Offline           27
  3  Present           27

They will sit at present for several minutes, then change to empty for a
few minutes, then return back to offline.

While they are in the 'present' state, they will show up in the show
chassis hardware output-
FPC 3            REV 10   710-000175   AA7681            FPC

I've changed to different fpc's, different ssb's, different RE's and
changed the junos version. I even set the system clock back to 2001. No
change in symptoms.

Any and all ideas are appreciated.

Thanks-
Joe