
Sometimes it works, but most of the time it doesn't. Computers appear to boot but there is no display. The idiotic lights on the front of the computer flicker on and off as usual, but POST doesn't appear and the login screen never comes up. Press and hold the power button to turn off the computer and try again. After 3, 4 or 5 reboots the display finally works! But wait. The Power, Caps Lock, and Scroll Lock LEDs on the keyboard are off. Both keyboard and mouse are dead. Reboot a few more times. FINALLY I can get in. The 4K display is stable and looks good. Repeat the above process three more times. Ok time to work. Damn it's time for lunch! System configuration: Four Dell Optiplex 7010SFF, standard Dell wired keyboard and mouse, LG 43UD79 43-inch 4K UDH. Two Windows 10 and two Linux Mint 19.3. Luckily I print online!

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