I have a nice 22” Samsung monitor...well, it WAS nice, when it worked properly. I am pretty certain it is the power supply (turns on, then turns off after a few seconds), but I haven’t confirmed that yet. How hard is it to replace a power supply, and is it worth it? Mine is out of warranty, so it’s up to me. I don’t want to spend too much time or effort; a new 24” Samsung monitor can be picked up for less than $300.