nightrave

OK, new amp didn't solve the issue :( any other suggestions? Please. Having no music is killing me

I had a rough 6 months with no music. Now I finally had time to check everything with a multimeter - all the fuses are fine. I have found a replacement amp on ebay. Was about to buy it but seen the message in the amp description "ECU WILL NEED RECODED TO YOUR CAR". Does that mean there is extra fiddling with ECU after I replace the amp (as I could do it myself)?

I've a 2003 lexus GS300 with premium sound radio, not Mark Levinson. I had some issues with my lexus after mixed the battery poles, had to get ECU reset and change a lot of fuses. Everything seems to be working but the volume/power. Radio seems to be working (finding stations), cd plays, but the volume know doesn't work (along with the sound. No sound at all from the speakers). If I try to adjust the bass/fidelity to test if the know works - same thing. Can't adjust by turning it. Only power the radio on by pushing the knob. Any suggestions? two weeks with no music now ;(