This model is known to have issues with the power supply.
Dell monitor power supply replacement.
The user guide indicates that the replacement part number is either.
Until i have the schematic off the power supply i opted to replace the power supply with a known good one.
In the time since we have tried at least 5 replacement adapters.
Make offer dell up2516d 25 monitor power supply board 748 a1002 0011 l5215 1 w cable dell ultrasharp u2410 power board 792842000a00r 24 monitor part 29 99.
Delta da65nm111 00 or chicony ha65ns5 00 we have tried both.
Most common are are failed capacitors and switching diodes.
12v ac dc adapter compatible with aoc led lcd monitor 16 20 22 23 24 27 hp 2011x 2211x 2311x dell 22 23 replacement switching power supply cord 4 9 out of 5 stars 33 12 88 12.
A few months ago someone stole the power adapter.
It is a straight forward replacement with the toughest part being the front.
Ac power supply adapter cord for dell lcd flat panel monitor soundbar speaker models ax510 ax510pa as501 as501pa replaces hksc 060693ep hk c112 a12 and dve dsa 15p 12 4 2 out of 5 stars 56 11 69 11.