Earnest payphone guts

[MADhouseTelephone]

I have an Earnest D3 that is DOA. My other Earnest works fine and is publicly accessible.  If any of you have a spare motherboard so I can get my  second phone operational,  let me know. mtc@kans.com. ADavid. MADhouse Telephone Co.
PS: I have the Telelink program running on my XP computer to do basic programming of these phones and I  can share a copy.