I seem to remember there are two slightly different versions of the Beomaster 1600 chassis. However, in the one shown here, that shielded lead goes to a tag on the potentiometer, it may be the same in your BM: Martin

Most likely, you won't be able to remove the yellow color from the nicotine. It settles within the material. I have heard of solutions involving soaking in bleach or chlorine but I haven't tried that myself so I cannot advice. The sliders will need proper cleaning. Take them apart and clean the slider track, that's the one next to the resistive

Mika, A LED in a Dirigent ! I have a feeling that I've seen that photo before. So wonderful with the glowing valves, you can almost feel the warmth. Very nice work. Martin

The base is metal covered with plastic of some sort. It may be possible to polish the scratch away, or at least make it less obvious. It depends on the depth of the scratch. It may also be possible to find a replacement bottom plate from a donor somewhere. Martin

Du har fundet en BOFA forstærker. BOFA var B&O's afdeling for bl.a. biograf-udstyr, skole-anlæg osv. Forstærkeren er ganske rigtigt lidt af en sjældenhed. Om den er mange penge værd, er svært at sige, det er ikke millioner, men den bør under ingen omstædigheder skrottes. Jeg er sikker på

Steve, you have a PM. Martin

You can put an ohm-meter across it and check for continuity. Expect something like 4-6 ohms if measured out of circuit. Alternatively, swap it with the tweeter in the working cabinet and see if the problem moves with it. I may be able to supply a good used original tweeter if you need. Martin

John, was this the deck where you got the motor/power connectors mixed up ? If so, there may be some defective and/or functionally scarred components now. Check the power switching components on the main board. Martin

There are four tiny bronze leaf contacts at the underside of the black plastic tab that grips into the upper part of the cartridge. These are what you should touch. The tiny bronze leaf that sits alone near the bottom of the socket, is for grounding and won't produce any sound when touched. Martin

It won't start without a record. Just put a record on, it won't lower the tonearm onto the record without a cartridge. Press play, catch the tonearm when it would normally have lowered, touch the contacts and listen. If you are treated with a healthy buzz from both channels the Beocenter is fine and the cartridge is bad. Martin