The chassis is on the bench now. Visual fault finding in progress. There are no very nasty surprises but still a couple of issues stand out: The fuse and its holder has oxidized to a point where replacement is the only way. It seems to be almost a rule in these old sets and luckily it's an easy fix with two new clamps and a new fuse. Before After

I agree. I've heard the diagnose before but it was always the laser current and/or focus that was off. If the laser don't see the CD, the spindle motor won't start. Some decks give a tiny jerk with the CD if they don't get a reflection at the first beam of the laser in an attempt to rotate the CD away from an eventual dark spot and then

Rudy, Sounds like it could be either the SPS5431, one of the selector IC's or an unstable 15V. Don't get me wrong but if you cannot find out how to get in there, I doubt you will be able do the repair. Are you familiar with electronics ? Do you have a standard electronics soldering iron and basic electronic tools and the skills to use them

A typical build from B&O at that time. Using both the old fashion birds nest structure and printed circuitboards. In this set, the FM frontend is housed in a shielding metal casing and is built on a circuit board, the amplifier is on another board and the rest is a birds nest construction. Martin

It comes out in one piece, bringing with it the dial and all knobs. Wonderfully easy to work with now. Martin

Well, back to taking out the chassis. It's held in place by two screws. One came out right away, the other one had about half an hours work worth of rust. I had to oil the threading a bit to losen it but out it came. The two speaker leads had to be cut and the chassis will now slide out. Martin

Actually, I can now also see why the tuning knob has seized. The dial string looks fine but the knob spindle that also bears the large flywheel has an amount of surface rust, just enough to have rusted solid in its bearings. The bearings are square pieces of fiberboard with holes. A single drop of oil in each bearing and a little exercise saw the tuning

But nothing the vacuum cleaner can't handle. There, much better. Now I can see the components. Martin

More spiderwebs Martin

Off with it Martin