broken speaker?

[pousti]

i looked high and low for a solution to my problem. My speaker
seems broken. i dont think its rom related but this all started after i installed mighty 4.1 and then totaly broken with 4.2. i can start a mp3 or whatever uses the speaker(ear speaker still works thank god)
but then cuts off while playing, then works again
when it feels like it. when pluging the headphones
there is no problem, music rings all sounds
are ok. also if i fast forward in mp3 it works then cuts off again. i called telus techsup and they said they will replace the phone. i already re-flashed to telus stock and relocked the phone. i hope i dont have problems exchanging