Exactly ! There are four of them housed in a little metal shielding together with a lamp. Two for each channel (volume and loudness). Martin

Sounds like the adjustment of the diaphragm is slightly off. It's in the service manual. Martin

It makes sense alright. You will probably find the lamp inside the LDR housing burned. The lamp regulates the volume through the LDR's in a way so that less light gives higher volume. Fortunately, a clever little circuit mutes the amp inputs if the lamp draws no current (burned filament), otherwise it would give max volume constantly. Martin

There are some protective diodes (zener's if my memory serves me right) built in to catch the fall in situations like this. You will have to check them and replace any (or all) in every datalink product connected including the Beomaster. Also in products that weren't connected when the fault occured but was connected later. I've seen this

Mika, Which key tops are missing ? I have a small stock of used parts and also some keytops. I am sure that I don't have the OFF key, though. Being the only key coming back up by itself after being pressed, leaving the Beomaster nice and flush when powered off, it seems to be most prone to losen and get lost. Maybe another button can be mounted

A lamp kit is available, containing a complete set of new lamps. The kit also fixes a couple of design glitches with regards to the tuner and lamp power supplies. Martin

The bottom plate is plastic but quite thick and not really as flimsy as it sounds. I've seen some wall mounted and it looked very good. It also has a little stand underneath to tilt it slightly, also a very nice feature and much better than placing it all flat in my opnion. I parted with this white one recently, photos show it tilted: http://cgi

Definitely one of the best sounding amplifiers B&O ever built and an incredibly simple build at that. It's also one of my all-time favourites but it seems to have been forgotten by many people or at least greatly overlooked. It's a beautiful receiver with a powerful sound and clearly deserves much more attention and respect than it gets

Original manuals will always be worth something. Warranty cards maybe less so but there are many collectors out there, also of documentation. An eventual sale and its price will depend greatly on the presence of the right buyer(s). Impossible to predict, I'm afraid. Martin

1. will probably have a stuck button. Make sure that all buttons make a distinct little click when pressed. 2. will probably have cracked solders. You will have to open it to see if that's the case. Could also be defects in the PCB tracks or a chip at fault even if that is rare to see. Martin