FortiGate-5001A status LED is flashing during system operation
Normally, the FortiGate-5001A Status LED 
is off when the FortiGate-5001A board is operating normally. If this LED starts flashing while the board is operating, a fault condition may exist. At the same time the FortiGate-5001A may stop processing traffic.
To resolve the problem you can try removing and reinserting the FortiGate-5001A board in the chassis slot. Reloading the firmware may also help.
If this does not solve the problem there may have been a hardware failure or other problem. Contact Fortinet Technical Support for assistance.
FortiGate AMC modules not detected by FortiGate-5001A board
If the FortiGate-5001A board cannot detect the FortiGate AMC module installed in the FortiGate-5001A front panel AMC opening, the AMC module interfaces will not be visible from the FortiGate-5001A web-based manager or CLI. Also, the AMC module HS LED could be solid blue.
To correct this problem you should remove and re-insert the AMC module. Because AMC modules are not hot swappable, you must first remove the FortiGate-5001A board.
Caution: Do not operate the FortiGate-5001A board with an open AMC opening. For
! optimum cooling performance and safety, the AMC opening must contain a slot filler panel or a FortiGate AMC module.
Caution: Because the FortiGate-5001A board does not support hot swapping AMC
! modules, you must eject the FortiGate-5001A board from its chassis slot and completely open the handles before inserting or removing AMC modules or slot filler panels.
To remove and reset an AMC module
1 Attach an ESD wrist strap to your wrist and to an ESD socket or to a bare metal surface on the chassis or frame.
2 Remove the FortiGate-5001A board from the chassis slot.
See “Removing a FortiGate-5001A board” on page 18. You do not have to completely remove the FortiGate-5001A board from the slot; however the board should be disconnected from power.
3 With the FortiGate-5001A left (top) handle fully open, pull the latch on the AMC module front panel to open the latch and pull the AMC module out of the FortiGate-5001A front panel AMC opening.
4 With the FortiGate-5001A left (top) handle fully open, re-insert the AMC module into the FortiGate-5001A front panel AMC opening.
Make sure the AMC module is inserted correctly into the opening.
5 Close the latch on the AMC front panel.
6 Insert the FortiGate-5001A board into the chassis slot.
Both the AMC module and the FortiGate-5001A board should start up. If both the FortiGate-5001A board and the AMC module are functioning normally, the front panel LEDs will appear as described in Table 4 on page 17 and Table 5 on page 17.
7 If this does not solve the problem, contact Fortinet Technical Support.
