HP 1220c

My hP 1220c does not turn on. I have read all of the other messages on
other sites as to replacing R13, rear door not locked. But to no
avail. I sent the printer to a technician who deals mainly with TV's,
VCR's and he replaced R13 but the printer still would not turn on. He
hooked it up to a scope and told me that the scope indidicates that
the printer stays on for about 200 cycles and then shuts off. When it
first broke on me, I was able to get it to turn back on after several
pushes of all of the buttons in frustration. But it only turned on the
one last time, and died. Please note that when all three buttons are
pushed, The green and amber lights turn on briefly. Does anyone have
any cost efficient ideas on how to fix this. I would hate to scrap the
printer. Or if someone wants to sell one that has a different
non-repareable problem, please let me know if you would sell it for
the parts. Thanks.