I would try doing a fresh installation from the latest software. The download and full instructions are on the JJP website.

If that doesn’t work it could be the hard drive or memory inside the computer has gone bad and needs to be replaced.

Hook a keyboard with a usb cable to the update cable by the coin box, and hit escape and see if it gets going. Or hit F2 next.

LTG : )

Hi. This is Ray, a friend of Ed. I do have 30 plus years in arcade games but no JJP's. WOZ boots as Ed described earlier. ESC nor F2 had any effect. I have only 2.96V on battery. I suspect I will need to reprogram BIOS. Holding F2 brought me to "Enter Password". That is where I stopped. I could use more advice on how to proceed.

Password is qmodem

LTG : )

Or the solid state hard drive is dead.

Solid state drives normally retain data for only a couple years with no power. I'd check the drive for errors and try reloading the software.

Thank you guys for the help. It may be a week or more before I can get back to Ed's. I will bring a Full Reinstall stick that I made from jjp.com. When I do go back there I will replace the battery and use that password. Can I expect that will show me a familiar mobo BIOS? And are there any special settings or are defaults ok? I would imagine ON after Power Fail is essential. So WOZ has an ssd? I don't have any of those but would it be feasible to bring a 2.5" sata just to use for troubleshooting?

Yes all JJ pins have a SSD hard drive in them. After all, It is a computer running Linux.....

Well I am back at Ed’s WOZ. I have changed the battery and reset the date and time within the BIOS. I also made sure it was set to “Power On” after power loss.

The BIOS reports No SATA devices found, and of course the full restore from thumb drive failed with error:
[ Unable to find target hard drive: “sda”!!! ]

I teporarily put in a used 2.5” spinning HDD and the restore seemed to work just fine. After completetion the game booted normally.

So aside from having a bad SSD, are there any other settings that need to be changed in the BIOS?

If the drive was off for two years and 'forgot' its data repartitioning and reloading may be all that's needed. Many standard hard drive tools can test it.

Edit: If you go into the BIOS in the hdd section and the motherboard shows the drive but the OS won't see it that's a sign it may still be good.