Below is the procedures to isolate the cause of this issue:
1, Power down this PN, and unplug all circuit packs including IPSIs.
2, There are 2 G650s in this PN―A and B, unstack them by disconnect them on backplane, and test them separately : Insert back IPSI on A G650 only and power it up, and check if IPSI and PSU can be detected correctly, if not, it could be the backplane faulty on this G650; if yes, then insert back other circuit packs on A G650 one at a time, and check which circuit may causing this issue, and also check if there’s any bent pins in that slot. Note: pay more attention on analog board 14A05 if this board was inserted since it’s alarming and showing as “no board”. Do the same procedures again on B G650 separately . In this way, hopefully we can identify if there’s any faulty circuit pack or bent pins, or maybe faulty backplane on one of these 2 G650s which are causing issue.
3, If still can’t isolate the issue with above steps, power them down and stack them up again -- connect them on backplane with TDM/LAN bus cable and terminator. Note: Please bring new bus cable and terminator and replace the old ones and make sure they are all plugged in properly, since this issue may caused by the old TDM/LAN bus cable/Terminator.
4, Please bring a M/T board (TN771DP) to customer site. If after tried all above and still can’t isolate the issue, then try to replace the old M/T board in slot 14B02 and see if it can detect any packet bus faults or Open Bus Leads.
5. In another case, PN1 had 3 cabinets, A, B and C with 2 IPSIs in A and B. IPSI in 1B was bad and had to be replaced.
