TI Professional Computer (TIPC) Service Manual?

[Martin Peters]

I wanted to reactivate a TI Professional Computer (TIPC) and all I get
some seconds after powering it on is the message

"** system error ** 0004"

and a beep, lasting for about 2 seconds.

The TIPC is an early, not really compatible clone of the IBM PC 5150. I
wonder if I need to do some reengineering and/or disassembling or if
there is a service manual out there.

greetings,
Martin
-- 
Martin Peters
martin at shackspace.de