AVAYA 4548GT-PWR Stack POE Problem

[marti571]

Hello.
I have a stack of 3 Avaya 4548GT-PWR
since few day, on 2 switchs in the stack i have no POE !!

Whitch command line i can see :
SWITCH#show poe-port-status
Admin Current Limit
Unit/Port Status Status Classification (Watts) Priority
--------- ------- ----------------- -------------- ------- --------
1/1 Enable Delivering Power Error 16 Low
1/2 Enable Detecting 0 16 Low
1/3 Enable Detecting 0 16 Low
1/4 Enable Invalid PD 0 16 Low
1/5 Enable Detecting 0 16 Low
1/6 Enable Detecting 0 16 Low


For exemple port 1/1 was a port with POE equipement plugged ....
When i unplug this ports, the error stay ...

For the switch it is delevering power... but there is nothing plugged in this port... it is the same when i disabled the port...

I had no test to reboot stack because it is a production equipment.

Ethernet Routing Switch 4548GT-PWR HW:04 FW:5.3.0.3 SW:v5.6.0.009 BN:09 (c) Avaya Networks

have you some ideas to solve my problem ?