I had similar problems with my Forsell transport years ago when I had it, and sent it to a dealer in California whose name escapes me now (I believe the owner was Elliott Midwood?) who gave it a good cleaning and adjustment, fixed it perfectly. No idea if he still does that, though. Back in 2005, I was advised that the tech for Forsell in the US was Joe Laliberte C/O Ensemble; 28 Charron Ave, #7; Nashua, NH 03063; tel: 603 595-9871, ext. 203. All of these may be out of date at this point, but worth a try.
Where to fix Forsell Air Reference Transport and D/A
The transport unit keep giving reading error message and on/off of D/A unit no longer works. I contacted Dr.Forsell himself but his staff told me they no longer support the product. Any suggestion? I suspect for the transport a swap for the optical drive will do but it could be hard to find the old Philip drive.