To solve power on problems, inspect the board. In my case there was a cold solder joint that actually showed a little spark when plugged in (photo Q816). Re-soldering fixed it. Your case might be harder to find and fix.

Many repair guides talk about replacing all capacitors rather aimlessly. In this monitor they used Nichico caps which are very reliable. So that is an unlikely fix.

Be extremely careful fixing these switching power supplies, even more so in Europe where one has 230V. Discharge capacitors etc.

If you liked this guide, contribute your own.

If things are unclear, leave a comment.