Resolve Windows 10 related issues for your HP computers or printers by HP Windows 10 Support Center
Windows 11 Upgrade Guide
I powered down and disconnected the system for about a week to redecorate the room.
When I plugged it back, it wouldn't power up.
The wall socket is live - tested with a desktop lamp.
Check and swapped the fuse in the plug - fine.
Noticed that the power adapter feels cool to touch even when plugged in for over 3 days.
I haven't got a spare power adapter for this unit.
Unless you have access to a Multimeter, you won't be able to test the power adapter -- and without that working, you're not going to be able to run diagnostics to hunt down hardware problems.
You will probably have to take this into a PC repair place to see if they can test the adapter and provide you another one to get your PC running.
Didn't find what you were looking for?
Ask the community