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09-12-2019 10:09 AM
I was working when it suddenly went to black screen. I have tried unplugging, holding the start button for 15 seconds, tapping the start button. The light blinks, but that's it.
09-12-2019 10:12 AM
First:- Turn off the computer, press and hold the PWR button for 4 seconds.
Then - Leave only keyboard and mouse connected, disconnect all externally connected
devices such as Docking Station, USB storage devices, displays, and printers.
Unplug the AC adapter from the computer.
Next - Press and Hold the Power button for 15 seconds to Hard Reset.
Rinse and Repeat
AND/OR - Power on your PC, press Esc (repeatedly), then F2 at the prompt.
Choose System Tests (Fast Test does a 4 minute hardware check).
HOW DO I USE DIAGNOSTICS?
HP PC Hardware Diagnostics Windows is a Windows-based utility that allows you to run diagnostic tests to determine if the computer hardware is functioning properly. The tool runs within the Windows operating system in order to diagnose hardware failures. HP PC Hardware Diagnostics Windows comes pre-installed on new HP computers, but if not on yours, download here:- http://ftp.hp.com/pub/softpaq/sp93001-93500/sp93457.exe
09-12-2019 10:46 AM - edited 09-12-2019 10:54 AM
I unplugged it at the computer back, held the start button for 4 seconds, turned it on, held the start button for 15 seconds, then repeatedly pressed ESC for a full minute. Just black screen. The power button light blinks 7 times, pause, 7 blinks, etc.
09-13-2019 01:23 AM
Unfortunately I do not.
All I know about All-in-Ones could be typed on the back of a postage stamp.