Switch goes into power-forever after losing all FANs

If a switch loses all fans, no matter bad hardware or removing parts, the switch should go into a "power-forever" mode. To exit this hardware protection, you have to unplug ALL power cords and reinsert them. This will reset the hardware logic. Unplug then plug power cord one by one doesn't work, neither the power flap.

Shutdown the fabric link reporting CRC error

If you are seeing some SerdesCrcError in the output of "show hardware counter drop", that means you probably have some bad fabric hardware. 

R1.09:39:22#sh hardware counter drop | grep Crc
A     Fe3600-1/1   SerdesCrcErrors-18             :              82 : 2019-05-09 16:16:12 : 2019-05-14 09:31:54
A     Fe3600-4/1   SerdesCrcErrors-129            :             739 : 2019-05-09 16:32:43 : 2019-05-13 21:02:26
A     Jericho11/0   SerdesCrcErrors-43             :            2444 : 2019-05-09 16:03:03 : 2019-05-13 21:02:20
A     Jericho5/3   SerdesCrcErrors-8              :          215410 : 2019-05-09 16:02:05 : 2019-05-13 21:02:10

In this case, you can shut down the problematic fabric link to avoid them. 

R1.09:42:32(config)#platform Jericho Jericho5/3 serdes 8 shutdown
R1.09:43:11(config)#platform Jericho Jericho11/0 serdes 43 shutdown
R1.09:43:33(config)#platform Fe3600 Fe3600-1/1 serdes 18 shutdown
R1.09:43:53(config)#platform Fe3600 Fe3600-4/1 serdes 129 shutdown