Forgot to mention: the speakers were linked to a Beosystem 2500. Is it necessarily the display that has a fault, or could it also be a problem of the Beosystem or the wiring?

Rgds

If the display shows at least something, everything else is fine and the fault must be in the display module itself.

According to the service manuals the II and III displays have a completely different interface. The internal structure of the display module is not shown so there's no help for repairing it, but it might still be possible... anything from a dry solder joint to a blown driver component to a failed display element, impossible to say without taking a look.

Thanks very much. Doesn't sound like an easy task. The speakers are cosmetically in superb condition. Better than the pair that I already own. However, the display error is something that really disturbs me. Very minor. Basically, there's one dot that is not correctly displayed. But if you know it, you always look there. If the seller were letting them go for a low enough price, that'll still be ok. However, he's asking quite a bit which will probably deter me from buying. Thanks again!

tournedos wrote:

the II and III displays have a completely different interface

Well not entirely true. The interface between the display controller card and the speaker are identical. So a MKII display unit with its controller cards will work in a MKIII speaker. Could be difficult to find a complete pair of MKII display units though.

Regarding the weak or missing dot in the MKIII display I would think is a bad solder joint.

The display in your avatar is a MK2 display, isn't it? I like it better since it matches the Beolab 5000 display much better and has the additional items "Source" and "Track" on it.

Rgds, Kai

Yes its the MKII display. I also like it better.

BO wrote:

Well not entirely true. The interface between the display controller card and the speaker are identical.

Yes, I see the confusion now - for some reason, I was thinking about the interface between the actual display module and the controller board. You could of course swap them both over.. if they fit mechanically, I dunno.

Gentlemen,

The display PCB's in the II's and III's are (as previously mentioned) in fact very different, the II being the more sophisticated one with an ambient light LDR etc. The connection from the amplifier to the PCB, however, is almost identical.

I just tried to swap the entire display units from our III's into the II's, but for some reason they don't seem to work. Vice versa it would require some cutting on the connectors, which I'm not willing to do. Has anyone got an idea what the reason could be? All displays work fine on their respective speakers.

Regards!

Strange, if you look at the schematics it should work.