My Altec Lansing VS4121 stopped working when i play my dvd. I can only hear very very faint sounds. It is totally fine when i watch tv. So obviously the speakers are not damaged. What could be the problem?
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Umm, so what's the question? The sub COULD be damaged or it could be reacting to being overdriven. Sometimes resonances form due to room- or nearby surface interactions. Try moving the sub a foot or two in each direction. Or turn the bass down.
If the speakers are brand new it makes me wonder how you know they worked fine in the States? I am also wondering how they were transported due to them probably being intolerant to extremes of temperature/humidity and probably vibration.
I am also wondering if you are using the correct supply voltage and type of supply.
If you are using the power adaptor supplied for use in the USA, it would probably be incompatible with your supply even though you are using a transformer.
If you are certain the speakers are in good order I suggest you obtain a power adaptor designed for your 220 volt 50Hz supply. I have browsed a little and cannot find a note of the power requirements for the integrated amplifier but this is presumably marked on the adaptor, the speaker or in the manual and so the power adaptor could be checked on and off load with a suitable voltmeter. I would be surprised to learn the supply is adequate
If removing and reinstalling the driver fixed your problem then there was nothing wrong with the speakes. There was probably a problem with your soundcard drivers.
That being said, you should double check that you speakers are plugged in to the right sound board connector and the power supply is plugged into the wall outlet.
Does you computer have a headphone jack? If it does, you might try plugging a headset into it to see if you can hear sound there. If you do then you'll know the soundboard is working properly and maybe the speakers really are part of the problem. CD/DVD drives usually have a headset jack, but this will only work if a cable was run inside the computer from the CD/DVD drive to either the soundboard or motherboard.
What kind of computer do you have? Do you know if you have on board sound or a seperate sound board?