HP 150 Touchscreen

[Michael Welch]

Hello Friends:

Just cleaning out storage and decided to sell my one-owner HP150B.

But first I need to make it work. It was working when I put it back in its boxes 20 +/- years ago.

But, I can't get past the pre-boot error message, "Power-on test failed 0004" or sometimes "0000c".

Anybody know these error messages? Or better yet, where I can get a list of power-on error messages?