1)Press and hold [ON]
2)press and release [E]
3)release [ON]
Press [ON] [C] to stop the selftest.
You will see a screen similar to the one in the picture.
If your HP executes properly the selftest it is working well.
If not, it has problems and probably needs service.
It is unfortunate, considering that enthusiasm moves the world,
that so few enthusiasts can be trusted to tell the truth.
