I have a personal desktop and a work laptop, and the problem is with my desktop's monitor. When I work, I shut down my personal desktop but the monitor is connected to a UPS back up which stays on because my wireless modem that I need for work is also connected to the UPS. I manually switch off the monitor so that its power light turns off, and connect my laptop to the mains electric supply and work. However, after working for 9 hours when I shut down my laptop and power on my desktop and monitor, the monitor refuses to wake up. I have to try switching off the UPS and starting my desktop a few times and after about an hour or more of trying, the monitor finally decides to wake up and function as normal. I have tried some of the tips I have seen online about enabling USB wake up and stuff but none of those options have worked for me. If I leave the entire desktop and UPS switched off for the night, in the morning the monitor works fine, it doesn't refuse to wake up. But after work, when I turn the desktop on, it just flashes the boot up screen for a second and goes to sleep again. At least, I think it is sleeping as the monitor's power light stays lit up but the screen itself is blank/dark. I am using Windows 10 Pro, with AMD Ryzen processor and 32 GB RAM and my monitor is a Samsung. I never had this problem with my previous desktops, maybe it is a Windows problem now or maybe the monitor itself, I don't know. If someone could help me work this out so that when I turn my desktop after I finish work, the monitor starts working normally immediately, I would be very grateful. Sorry if this should have been posted in the Hardware section, I apologize. If more info about my PC is required, do tell me please. I am writing this after work today, and it took about 1 hour and 10 minutes of switching off everything and starting up again to get my monitor working. Hopefully someone here can help me rectify this problem. Thank you so much for taking time to read my long winded post.