If you had installed a problematic file into the storage of the device containing malware.ĭespite the reasons above, you could easily fix the black screen issue and go back to enabling the sleep mode on the PC without any question.If you had recently updated your Windows OS on the system.This could occur due to any number of the following reasons. Nothing could get more irritating for the Windows PC user then the time when their device would refuse to start and show a black screen after ending the sleep mode. Part 1: Black Screen after Sleep in Windows 10.