I still need help or advice on bringing an HP-9815 back to life. It worked fine, then sat for a little while, and now does not work.
When turned on, the display shows all "-------" and has no visible responses to keypresses.
When turned on in Auto-Start mode, a program will load from tape, the User-Interface instructions from the program will print, then when the program waits for keyboard input (even just a r/s) there is no further action.
I don't have a 'scope to check out what's happening and I would like this fine machine to come back alive, I am hoping that there's not that much wrong with it.
Any help or advice will be greatly appreciated!
Thanks, Dan