When i first turn it on it works fine! Then after aPPROX 10-15 MINS it makes a buzzing sound and the sound goes off and subwoofer fan comes on, and it stays this way indefinately! Any reason why? Is this a problem with this unit? Other than that this syatem actually sounds great! Thanks for any information you may have!
Possibly the heat sink has insufficient thermal coupling compound. I had a similar problem on mine and after opening the subwoofer and having a look about, I resoldered every cold solder joint I could see, and there were quite a few. I don't know if that fixed anything, but while I was in there I pulled off the heatsink which is held by 5 or six screws, cleaned off the generic white heatsink grease and replaced it with artic silver or some similar metallic paste.
I slipped it back together and hooked all the wires back up and so far it sounds like new. I'm on track 5 of U2 Achtung Baby, and I'm amazed at the clarity. It sounds better than when I bought it brand new.
I'll run it for an hour or two and see if any problems develop.
Good luck, your mileage may vary.
Might be over heating take blower to inside clean the fans well put it in well vented area cheak conections
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