Power supply will not power up.

[Dave Chamberlin]

Greetings, I have an rp7400 (N4000) with three power supplies. Supply in slot 0 failed, so I replaced the unit, but it will not not work. I verified the unit is good, by putting it into an identical box and the green LED comes on as it should when the supply is on. I checked the ac plug inside the rear of the bay and it has power. There are no bent pins etc in the multipin connector on the top of the bay. Does anyone have any ideas? Thanks 

[Torsten.]

There is a small switch at the front of the psu. Did you switch off, insert the power supply, then switch it on?

[Dave Chamberlin]

Yes master. I wish it was that simple!! I followed the procedure in the service manual, turned off the unit before pluggin in, then truned on the unit. Any other ideas?

[Robert_Jewell]

Do you receive any alerts from the GSP after inserting the Power Supply?   If no, then the Power Monitor isnt aware that it exists.  Perhaps the AC Line filter is faulty? 

You may want to confirm that the AC line being used is providing 200-220VAC (110-120VAC will not work).

-Bob