NO SOUND, DSP DIE?

[PANAMAJACK]

Can someone help me, I replaced the battery on my 2004 X5 and a few days later the sound from the radio (NON-NAV SYSTEM) when off.
The radio turns on fine, but not sound. I push the DSP switch on the radio and nothing happens, not even the little red L.E.D. lights up.

I disconnected the battery for over 30 minutes, check the DSP connectors, unplugged and plugged them back again, connected back the battery and still it did not work, in fact the 4x4 yellow warning light came on! and stays on!.

My dealer in Panama wants to change the DSP unit at over $1,400 dollars, but I want to check out everything else before having to pay that amount.

Any ideas or advice will be greatly appreciated.

[Mahmud5]

it happened me too ( with nav ) when i filled my battery with battery water , but i just turned of the car then turned it on and the DSP worked..
try with is , if you haven't done it