Hi @w3p3

Were there any software/hardware changes done on the server recently?

Please check the iDRAC logs for any errors related to power supplies.

If no other alerts are observed, please update the BIOS and iDRAC to the latest version and monitor the server if the alert reverts.

We recently got an AMP0303 warning on a Dell PowerEdge T330 tower server, no changes had been made. A reboot cleared the warning but a week or so later it happened again. There had been no changes to the server in a long time. Yesterday evening I shut down the server, removed both power supplies and blew canned air through them, also used a lot of canned air inside the server and on the mainboard, blowing off a bunch of dust and lint, powered it back up and now instead of the mainboard power usage at 840 watts like it did last night it is saying something like 88 watts. Not sure yet if this fixed the issue or if it will recur but so far it is holding well.