FCX 648 POE - Powersupply DC red - what does it mean ?

[mpi_bgc]

Hi,
we have an old FCX 648 POE with 2 power supplies. On one power supply an LED is red (DC) but the system (show chassis) tells me:

Power supply 1 (NA - AC - Regular) present, status ok
Power supply 2 (NA - AC - Regular) present, status ok

What does it mean ?(red led DC)

Thanks and bye, Peer

[mpi_bgc]

So another power supply does work. Trying the "defect" power supply in another switch (without a second power supply) does not work.
Thus the DC part seems to be dead. But then the show chassis command is wrong ...
Bye, Peer