So my buddy is giving me this machine for pretty cheap with fresh tape alignment tape and manual. I'm not asking for opinions about it..I can make good use of it. As above he told me the meters show signal but it doesn't pass signal to tape and print it. Since this is on all 24 channels and after looking at the power supply schematic I see it has seperate circuits for the transport (24 volts) LED's and logic (5 volts) and bipolar 12 and bipolar 15 which i assume are for the preamp cards...I'm wondering if something could possibly be wrong with the playback and record part of the power supply...this makes more sense to me than all the channel cards failing at once and even if the bias or alignment was off it would still do something...just badly. I don't have the machine on hand yet I'm just speculating here. Any folks in here worked on these units or have knowledge?