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Here are two suggestions:
The simplest method
1. turn off tv and laptop
2. hook up hdmi cable from laptop and then to hdtv
3. turn on laptop and once the laptop has booted fully,
4. turn on tv and select the source....
If the above doesn't work, then try
1. hdmi cable is connected from laptop to hdtv
2. on the laptop go to Control Panel
3. select sounds
4. change default from speakers to hdmi
I doubt both speakers are failing at the same time, it must be a software or settings issue.
Go to acer.com and find your computer under support downloads, download and install the latest audio drivers, you should uninstall the audio drivers installed first to ensure a clean installation of the driver, otherwise settings will be preserved and the new install will not reset any settings to default.
Report back and rate solution, thanks and Good Luck!
Check your audio settings in your control panel and make sure your setting are adjusted properly. If your using external speakers, you may have accidently switched the default speakers in the control panel, also check your advanced audio controls. Hope this helps and please rate ^^
that means the guy or someone who replace the new harddrive didn't to a good job on restiall a new window vista for you, just simply go acer.com and search your model, redownload the sound card driver.
First check the controlpanel there is an option to take Sounds And Audio Devices Properties. then click on the AUDIO tab, check the Default Sound Playback Device.select the correct Audio divice.if the problem persist do the driver for sound ( multimeadia audio driver) from the acer driver cd.then try.
go to acer, click on america, click on drivers & downloads, product line = notebook, product = aspire 3680... you will want to download the audio driver if using xp or the realtek hi def audio driver if using vista.
as far as the mkv support, VLC (video lan player) supports matroska pretty well, you can also download the CCCP playback pack of codecs to support mkv in pretty much any directshow player (media player, media player classic, winamp, etc)