NAD 216 THX power off all led go out slowly

Hello.
Amplifier NAD 216 THX.
Works fine.
After power on the red led passe on green after few seconds-ok.
But after power off the red light led,soft clipping and bridge mode
go out slowly within 2 minutes.....
Thank you
 
So what has changed? You said it worked fine and now you are asking about it taking 2 minutes to drain the power capacitors?
Mine was completely rebuilt and worked exactly like yours, power off and it would take about 2 minutes for the power light to go off, took that long for the caps to discharge below the 2.0V the led needed to stay lit.