Originally Posted by Mike Look

I had to disconnect the battery on my beloved A4TDI - 206000 miles from new - to clear the drain plugs.Now the radio has no power - totally dead. The main fuse no.43 is fine but is there a fuse at the rear of the radio head? - Radio is a Blaupunkt Concert.
Any help would be greatly appreciated.

Hello Mike welcome to Audi Forum,

yes,The Concert radio in your Audi A4 has a 5 amp Fuse at the rear of the Radio. I suspect that is the culprit in your case. Replacing it should fix the issue for you. Hope you get it fixed soon.

Regards
R.B.N.J

Thanks - replaced the fuse although the original looked ok. Radio still dead so I assume it is a coincidence that the radio packed up as soon as the power was removed.
Any other suggestions? I think I'll use a circuit tester to ascertain whether there is power reaching the unit before I send it for repair.
Once again thanks.

Originally Posted by Mike Look

Thanks - replaced the fuse although the original looked ok. Radio still dead so I assume it is a coincidence that the radio packed up as soon as the power was removed.
Any other suggestions? I think I'll use a circuit tester to ascertain whether there is power reaching the unit before I send it for repair.
Once again thanks.

Oh! Are you sure that the main fuses are fine? I would take the main fuses out one by one and check them as sometimes they look ok till you take them out. Hope you get it fixed soon.

Regards
R.B.N.J

good point I looked at the fuse I replaced more closely and it had blown so I cant figure out why the radio does not work when the replacement is fitted. I checked the replacement again after fitting and it has not blown so power should be getting to the radio. All fuses in the main board are fine.

Originally Posted by Mike Look

good point I looked at the fuse I replaced more closely and it had blown so I cant figure out why the radio does not work when the replacement is fitted. I checked the replacement again after fitting and it has not blown so power should be getting to the radio. All fuses in the main board are fine.

Oh! strange, Then probably there must be a problem within the Radio Head unit itself. Hope you get it fixed soon.

Regards
R.B.N.J