dead modem?

[psypher]

Ah... I thought it was a 85C30 (not a C80).  I had not seen that chip before!  Typically every Mac I have ever worked with uses a separate 53C80 and 85C30 chips.

Yeah, that is going to be tough to get off the board without the proper equipment.  Did you make a new 8 pin serial cable for the loop back test or use the same cable you had?  Maybe your cable is bad?

i didnt make a new 8 pin cable but i did test mine with  multi meter and it seems ok. by proper equipment do you mean a hot air rework station? i dont have one but i have been thinking of getting one. of course then there is the whole not having a spare chip, i have one on a parts board but that board had some major battery leakage so its not a 100% if it would be good.