Question about Memorex MVT2135 13 in. TV/VCR Combo

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I can`t get any audio. Its not on mute. I can turn the audio up and down on the screen

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Hello,

First check that any muting control is not activated. This might be a button on the remote or set itself. If you have a headphone jack, it may have dirty contacts as plugging in a headphone usually mutes the speaker.

If the set is mono or only one channel of a stereo set is out, then check for bad connections to the loudspeaker. Test the loudspeaker by disconnecting one of the wires (with the power off!) and measuring its resistance with an ohmmeter (it should be less than 100 ohms - probably less than 8 ohms). Or momentarily touch a 1.5 volt battery to the speaker terminals - you should get a click or pop from the speaker.

Next, trace back from the speaker output terminals to the circuit board and look for bad solder connections or a loose or dirty connector.

If these tests do not reveal anything, you probably need a scope (or audio signal tracer) and schematic. Or at least the part number off of the chip. Is the final amp a chip also or just a transistor? Have you tested the transistor? If there is little or no buzz from the speaker, that would indicate a problem fairly near the output. If the tuner/if were bad, I would expect some noise/hum pickup from the low level audio stages. Get the part number off of the chip. If it is in a socket, check the contacts for corrosion or looseness.
Hope it works...

Posted on Jun 01, 2010

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Turn off mute


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I have a dell d520 laptop and it has no sound. Also I cant find the volume button. Where is the sound card placed?


Hi,

The sound card is inside the laptop and is part of the motherboard. This means that you cannot take the sound card out and replace it.

You may need to reinstall the audio drivers for the machine but check first that the volume has not been muted. Look to the bottom right of the screen for an icon that looks like a speaker and click on that and see if it has been muted or just turned down.
If there is no speaker icon there it may have disappeared from the system tray. You can use your keyboard to turn the volume up or down and to mute and un-mute it.
The keyboard toggles are as follows >>>

To turn the volume up hold down Fn and press the PageUp key.
To turn the volume down hold down Fn and press the PageDn key.
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It is also a good idea to check in the BIOS to make sure the on-board audio has not been disabled.


If there is anything else please post back.


Good luck and kind regards.

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Are you sure it's not the TV telling you that it's muted? I went down the tubes on that one myself.

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