Dell P2411HB Buzzing noise at 80 percent or less brightness setting

[budm]

Full brightness setting is quiet, but if you go down below 80% it will buzz real loud, it turns out to be a cracked Ferrite core of the LED switching power supply.

[smason]

Re: Dell P2411HB Buzzing noise at 80 percent or less brightness setting

Interesting. How are you going to fix? I
I'd try epoxy myself, unless the part is easily obtained.

[budm]

Re: Dell P2411HB Buzzing noise at 80 percent or less brightness setting

I used gel super glue to join the crack together, and then pot it with epoxy. It is still running on the bench.