Ok so I have prepared a second user HP Slimline unit for sale, all tests and functions are great!
Get down the customer, machine works fine untill it needs to be turned off!
Whatever I did it would not turn off! All other power states are fine!
After embarrassment and taking the machine back home (long journey too) I found the problem
The machine comes with a RF Wireless Keyboard/Mouse set, yet I was using the PS/2 ports (Via my KVM) to control the PC.
It works with both the RF and PS/2 connected, yet would not turn off with only
the RF connected!!
Turns out a simple BIOS setting is needed, to disable the PS/2 Mouse support in the BIOS!! Now the machine is a happy camper once more!
Not my week this week, yet my car did pass it's MOT
so I'm very much looking forward to the weekend!