Hi looking for some opinions/advice, Monitor: Samsung s27a950d Background: Monitor is about 5+ years old and had been working perfectly till about a month ago when one day it didn't power on at all. No externally visible signs of root cause (i.e. no smoke/burning smell, no sparks, no popping sound etc just wouldn't power on). Took a punt and bought a replacement power adapter off e-bay (a Samsung one with same part/model as the original). Now the monitor powers up and the display picture quality is fine except for one glaring issue below. What's the Issue: When the screen is on for periods of time (sometimes a few minutes, sometimes say 15mins), it will randomly go blank, wait a few seconds, then the picture will come back. When this happens it will repeat 3-4 times before going back to normal. It's pretty annoying when it happens during a game (especially multiple times) that's for sure. If in windows, it will make the sound that a device has been disconnected, and then reconnected. I've been able to replicate a similar issue outside of Windows (like if I'm at the bios screen): If I go into the on screen controls and increase the brightness above 72/100 (factory default is 66/100). When this happens the monitor looks like it's rebooting as it goes blank and then the increased brightness setting isn't persisted. But in this case it doesn't go blank 3-4 times it's just once. Changing other settings (like contrast) on the OSD works without issues. Troubleshooting Attempted - (based on google): Running with just the single monitor connected only (i.e. removed secondary monitor) Turning it on/off again multiple times Leaving monitor unplugged for hours and trying again (to see if it's possibly a heat issue, but same result). "Factory Reset" on the monitor multiple times Plugging into different power sockets (within a powerboard and directly into different wall sockets) Different interface cables (switched between 2xHDMI, 2xDisplayport cables) Changing the windows refresh rate (120hz, 100hz, 60hz) and changing the monitor's "refresh interval" setting (Fastest->Normal) Tried different systems/video cards (GTX1070, RX570) with latest drivers As a comparison using a different monitor works fine with no issues with the above cables/power sockets/systems. My Suspicion? (a) It could either be the replacement power adapter isn't quite right. (b) Or (more likely I think) whatever caused the original power adapter to not work is actually a failure inside the monitor itself and the original power adapter (and this one) not working is just the symptom and not the root cause? For your consideration/input ? Given the above details I'm not sure if it's worth trying to buy an additional power adapter to rule out if the e-bay one could be an issue (as mentioned previously it is a Samsung one which matches the original specs/part number). On one hand it's been a really good monitor but I wouldn't want to keep throwing good money after bad particularly on something that's 5+ years old already. I'm interested in people's thoughts as to either what else I might be able to check/do, and/or if you think given the details it's likely/unlikely another power adapter would be worthwhile buying? Thanks for your consideration. tldr: monitor stopped working suddenly, replaced the power adapter and now it works but intermittently goes blank for few seconds at random times.