Question about Philips HTS3450 System

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Philips HTS3450 System Problem buzzing/clicking sound on startup. Now nothing.

I have the Philips HTS3450 DVD home theater system. I have had it for over a year now, and love it, except.... In the past couple of moths we recently moved. After hooking up the system exactly like it was premove, I get a clicking sound that starts out spaced apart, and progressivly gets closer, and closer, until it becomes one high pitched sound from all my speakers. It reminds me of some kinda of warming up sequance. It started out rather quickly, and over the past few months has gotten longer and slower. There is no sound until it goes through this routine. once its done, all is well, until.... Today, no clicking, no progression to a high pitch union. Nothing. So now I have no sound what so ever. I have double, and tripled checked all connections. Recycled the power several times. Double and tripled checked all settings too. I do not know what could be wrong....

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  • wmhechler Apr 06, 2008

    Since posting this message, I have Googled and looked elsewhere for an answer. I have found many a post of the same issue, but have yet to read a solution.

  • LAMPRO Aug 03, 2008

    Yeah I have the same problem.. Ive been turning the unit on after being off all night, and then i hear this static and noise coming from the speakers sort of like how the apr 6 post does. It happened a bunch of times, and i wea sable to click thorugh sources till it went to TV and finally some sound came out. But last night, it sorta took longer than usual (the static noise to go away) and then like apr 6 post, NO sound at all.. switching wires, cycling power, speaker swaps, nothing workd. Im going to radio shack to swap out those capacitors and hopefully it will work. any chance of getting some pics of this replacement.. maybe a DIY? Takinng apart the subwoofer? need some guidance through that..

    Thatd help alot.


  • johnvalley Nov 02, 2008

    Well, I Had the same problem. But with a few solders and a trip to Radio Shack (Both very easy) complete success!! Thanks a bunch!!

  • Anonymous Nov 12, 2008

    Same exact problem has anyone fixed this yet, if so how?

  • tmvitelli Mar 05, 2009

    Can someone provide step by step instructions for this correction...?

  • D Stella Aug 15, 2012

    +1 for the fix! <$20 (soldering tool, solder, and capacitors) and the system is back to where it was when I bought it. No more squealing, popping, or cracking! Thanks WheatService!

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As I found somewhere on the internet; there are two 470uF/25V capacitors on the power supply board in the sub-woofer that are the cause of buzzing, crackling and then eventually no sound. Go to Radio Shack and buy two Catalog #: 272-1030 470uF/35V capacitors and change them out. They are in the middle of the Power Supply PCB and are close to the long flat aluminum heatsink. Make sure you match the polarity properly when replacing. Your unit will be as good as new and will proibably last forever now.

Posted on Jul 18, 2008

  • webpagecons
    webpagecons Jun 04, 2014

    WheatService, thank you so much for your help, it was very useful and worked like a charm! Even the catalog number for the capacitors at Radio Shack were the same so it made the repair even easier. Thanks!

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I had the same problem except my volume would just decrease after a few minutes of being on like someone was pressing the volume down buttton. If I walked over to the subwoofer and gave it a knock on the top the volume would instantly come back on where I had it set before. I took WheatService's advice and replaced the 470uF/25Vcapacitors and everything is working great now. I am very pleased. BTW, the parts at radio shack were like $3.00. I needed a desoldering tool, which I would recommend for this job...the one with the suction ball. I also needed some more soldering wire for a total repair cost of about $17. If you have all the tools the capacitors will cost you $3.00. Philips wanted to send me a replacement unit for $100.00 and I'm sure the local repair shop would have been the same if not more. Thanks again, WheatService!

Posted on Aug 12, 2008

  • andersen_tra
    andersen_tra Feb 17, 2013

    Worked perfect...thanks for the good info :)

  • andersen_tra
    andersen_tra Feb 17, 2013

    This worked perfect... Thanks for the heads up ;)

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I confirmed that replacing the two 470uf 35v capacitors works. I had the same problem and took the advice above. I have no skills in soldering but pulled it off without a hitch.

James Brown's "I Feel Good" was playing on the radio when I turned the system back on !

Posted on Feb 06, 2009

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Replacing the two capacitors works!!! Thanks everyone!

Posted on Jan 04, 2011

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I've got a new problem. It would help if I could read. I replaced the main power capacitors (didn't catch the sub woofer part for some reason). So now I need to replace the transformers. Any idea what ratings I'm looking for when I buy new ones? About to remove them and start prowling thru other electronics in the house to see if I can find a match.

Posted on Dec 24, 2011

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Ok i added the capacitors, but now my power light on the subwoofer is just flashing and still now sound. any ideas?

Posted on Aug 05, 2010

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This works great, anyone with this model and buzzing problem should try this!!!!!!!! Mine stoped powering up as well.. the little red light on the sub would not turn green anymore. bought 272-1030 470uF/35V capacitors at the shack and changed them out..... powered right up... Im still kinda in shock. If anyone needs any help with which ones... email me ivtecboy@yahoo.com.

Posted on Jan 24, 2010

  • Brad Roth
    Brad Roth Jan 27, 2010

    This is off the subject of the above problem, but since my unit powers up now, does anyone elses not hold the station presets anymore? mine doesnt... is there a battery int he dvd section that holds these that went out?

  • jsg1k2 Jun 17, 2013

    Had the same symptoms. Replaced the 2 caps on psu. The problem still persists. Any ideas what else could be an issue.

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Thanks, WheatService! I followed instructions and fixed the problem for only $11!

Posted on Nov 10, 2008

I had the save the same problem

Posted on Jul 17, 2008

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  • Philips Master
  • 1,550 Answers

Maybe the ICs sound amplifiers are damaged.

Posted on Apr 06, 2008

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