Beomaster 4000 Repair

Bang & Olufsen Beomaster 4000 Repair

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Description

Beomaster 4000 Repair:

A Bang and Olufsen BeoMaster 4000 repair. She doesn’t power up and blows an internal fuse.

The main capacitors serving the power supply and speakers have started to spill their insides.

beomaster 4000 overheating visible

beomaster 4000 main capacitors

Having been sat in an unfriendly environment for many years she is very poorly.

The insides are full of dust contamination and most screws heads have turned to rust.

The main power rectifier was also dead. The trimmer potentiometers were malfunctioning.

The front faders were very noisy.

The signal strength indicator lights were not working.

The signal strength meter light was not working.

The power on light was dead.

Mot a single wire to board connector in sight, and removing any part seems to require almost total disassembly of the entire unit.

bang & olufsen beomaster internal dust

beomaster 4000 front panel dust trap

beomaster 4000 capacitor close up

bang & olifsen capacitors close up of cracking

beomaster 4000 capacitor close insides