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Home theatre /philips hts 3440

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!

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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.

Posted on May 09, 2009

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Might be over heating take blower to inside clean the fans well put it in well vented area cheak conections

Posted on Jan 26, 2008

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