The Beomaster 2400 can be serviced by a careful hobbyist, but if you're
a neophyte, it's going to be a challenge, because everything fits
together "just so".

That said, I'd get ahold of a service manual before proceeding. Stare at
the schamatics until they begin to make a bit of sense. One area I'd
look at would be a low-voltage supply used in switching audio sources:
The B&O injects a few volts of DC into the signal lines, causing signal
to flow (or not) through IN914 switching diodes. Kind of clever, but
that small power supply does fail from time to time, and when it does,
hum and/or unresponsive touch controls are the result.

I've also heard from other B&O restorers who claim that the original
electrolytic capacitors are failure prone and must be changed. There are
lot of electrolytics in the thing! I plan on eventually doing just
this to my own 2400, but after all the work, I don't think I'd ever be
able to break even in resale.

A pretty nice-sounding receiver overall; the FM tuner is best with
strong, clean signals.

Paul wrote
Hi All,

I recently purchased a Beomaster 2400-2. The guy I purchased it of
assured me it was working fine, but when I got it home it was a
different story....

There seems to be a loud humming noise in the background, this seems
to be present on all the inputs as well as the radio. I plugged in a
set of headphones (thinking it might be the speaker outputs), but the
hum was still there.

The other problem is with the radio...FM5 seems to work fine (despite
the hum) but all the other FM presets have no sound FM1 to FM4 (when I
turn up the volume to the maximum, I can hear them faintly)

I am just wondering if anyone has had any experience with these
systems?, and could describe what the problem may be.

I haven't had much technical experience, but I am adventurous with a
screwdriver and soldering iron.

If anyone has any schematics or any instructions on how to dismantle
it, that would also be great.

Given the problems, it is still a cool looking amp. I was gutted when
I discovered that it didn't work as I had been after one for quite a
while....

Any help appreciated,

Cheers,
Paul

Sydney, Australia