Altec lansing BXR1121 subwoofer keep sounding when turn it on

SOURCE: Sub Woofer does not work

hi there are fast checkings for you: Quick Connect Card http://www.alteclansing.com/downloads/641QCC.pdf manual: http://www.alteclansing.com/downloads/641_MAN.pdf is the system working fine exept the sub? my guess: the headphone jack works fine then the speakears are too if soo then the sub amp is bad or some connection is torn try opening the sub and see if everything is hooked right and if soo then the amp is the problem every electronics shop can fix this good luck

SOURCE: Finding replacement Power Supply for Altec Lansing

I did the same! Thanks for suggesting a call to Customer Support (800)258+3288. The guy didn't seem overly pleased to help, but he did promise to send me a new power supply. Also, he said that they don't make the iM7 anymore, but I had already found out that the iM9 uses the same power supply. I, too, will wait and see.

SOURCE: Compaq Presario v2000 ALTEC LANSING speakers not working

Go to "Start", "Control Panel", Administrative Tools, Computer Management, click on "Device Manager" on the left hand side and look on the right hand side. See if you have a yellow exclamation next to the "Sounds, Video and Game Controllers". If yes, double-click on the line with the exclamation and then click on the driver tab at the top. Click update driver and when it asks if you would like to to check the internet for updated drivers, tell it yes, this time only and continue. After this process, it should either download and install a new driver for your sound card or install the one that was shipped with your computer. If this does not work, please let me know and we will check the next possible problem.

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SOURCE: What's the volt & amps of Altec Lansing AVS300 2.1 speaker system

Your adapter is Part No. AVX300-A6859, Model No. 9701-00748-IUND.
Or You could get a universal that is rated for output of 18volt DC, 650ma, Center Positive.
I have used a 15volt DC, 900 ma with no problem, but I never run the volume high.

Good Luck

SOURCE: Altec Lansing ATP3 Speaker System Not Working

try to replace the power-amplifier TDA7377