Time to part with my 7978 9track reel-to-reel drive. Appears to have power supply problem with both motor drive and logic PSU's - fans function on power up but nothing else. Unfortunately I have not had the time/space/expertise to get to grips with repairing this so can't offer much more insight I'm afraid. Free to anyone who can physically remove it from me in Central London (really needs 2-3 people to carry it). Oliver