G4 iMac won't mount via TDM

[peterelphick]

Hi,

Mac 1 = 800Mhz G4 iMac 80GB HD 1GB RAM 10.2.8

Mac 2 = 3.06GHz Intel Core Duo 2 1TB HD 4GB RAM 10.7.3

I have several times successfully connected Mac 1 to Mac 2 via Firewire Target Disc Mode on Mac 1.

This morning however Mac 1 refuses to mount on Mac 2.

I have tried both 800to400 and 400to400 cables to no avail.

I am beginning to suspect possible hardware failure in the FW connector on Mac 1.

Thanks!

Pete