If the subwoofer is not repairable, is there a way that we can still use the lifestyle component with the dvd player and just use the speaker that is on the television until we get a new system ?
No, just connect the hdmi cable from the DVD to the TV and you will have volume on the TV.
The Bose lifestyle system may be ruined, try putting the DVD input into another connection CD Etc. if that doesn't work you'll have to replace the lifestyle component the subwoofer and speakers amy be good and can be re-used or sold. Check ebay sometimes people sell the just the lifestyle without speakers saving you some money.
SOURCE: bose acoustimas speaker output jacks not working
try to trace your problem inside the main circuitry of the jacks ( open it and see on the solder side of the Printed circuit board(where all the electronic components and soldered/welded if there are loose connections (small cracks... use magnifying glass if you have one) then solder them.
also check for the transistor amplifiers and output capacitors....
check also for the connectivity of all wirings!
SOURCE: bose acoustimass 25 subwoofer has no power
Honestly speaking you should probably not work on this unit yourself: "There are no user serviceable parts inside"
Even if you are an accomplished Electrical Engineer Bose will not provide the required schematics to troubleshoot and repair this unit.
Are you still undaunted . . . then if the case is the original LS-25 series, there is a hidden catch at the end of the cover furthest from the input connectors that needs to be rotated (until a plastic tab is sticking out), which you can do with a flat bladed screw driver, and you also need to remove a few screws from the bay where all of the connectors reside. Remove the two knobs from the side of the cover. Then hit the case with your fist at the far end (plastic tab) and the cover should then pop off. You may have to hit it hard, with an upward motion.
Note there is not going to be much you can do to fix this beyond replacing the fuse. (Note that the fuse may be soldered in.) The bass amplifier is op-amp based with discrete class G output stage and the twiddler amps are monolithics with discrete class G circuitry shared between several channels.
The power transformer has a thermal fuse in it as well which is not replaceable. If you play the unit loudly for long periods of time and it is not adequately ventilated it is possible for the thermal fuse to open - if this is the case you will definitely need to send it in for service.
When plugged in there are hazardous voltages present on the top PC board where the power connector is located, whether or not the unit is turned on.
Power switching is via a triac controlled by whichever front end you have CD-5? 12V should be present on the mini plug (tip I think, but might be ring) when the music center is on.
There is also offset detection circuitry that will latch the unit off should any output have more than a volt or so of offset.
For more information see following web site:
http://www.diyaudio.com/forums/showthread/t-106135.html
SOURCE: Bose Lifestyle 20 system. sound from only two speaker
A lifestyle 20 system is stereo only. Two channels. Left and right.
SOURCE: Want to connect non-bose speakers to a bose lifestyle system
this is possible, however not a very good idea.
Bose speakers are designed a little different than other brand speakers, the Equalizer built into the bose system will probably not sound amazing when you hook up your other speakers. Are you looking for more bass? cleaner highs?
if you want more bass, you could try doubling up your subs, if you want cleaner highs you could buy Bose Jewel Cube Speakers (purchased from a Bose Built-Invisible Dealer
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