Chosen Solution
Switched on the monitor after a week away and was fine for about an hour. Heard a pop and it went black. Suspect it’s the PSU. I bought a replacement monitor since I needed to get back to work. Now that I’ve opened it up, the power supply board looks physically fine. Expect perhaps a blown cap or something. How would I go about checking if I should risk buying a replacement board off eBay etc.
Eugen Khoo check your power fuse F601 for continuity and see if you have power on it. After that use your multimeter and check the large rectifier BD 601 and see if you have the DC and AC voltages. The " legs of the rectifier" should tell you which is AC and which is DC. Let us know what you find.
Hi Eugene, mine U2718Q is OK now after removing two fried capacitors (C962 was burn to ground and C963 looks OK but was short circuited) and replacing it with some random capacitor. It is around 14-18V at this capacitor so I take 220uf 25V and now monitor works fine for couple of days. For conspiracy theory adepts there even a cut-out window in metal shell for easy replacement of this capacitors without tearing everything down… ;)
Random capacitor was temporal solution but now I’m too lazy to replace it with SMD one.
Make sure any surge protector or power strip is correctly plugged into the outlet, and that the power switch is on. Plug in other devices to the power strip and confirm they are operating properly. Double-check that your PC’s power supply on/off switch is on. Regards, Will
