Nokia hs-45 doens't work well in left side,

SOURCE: Left Speaker Stopped Working

I think I had a similar problem. My speakers were brand new and after a while I lost my front left and rear left speaker. I'm not sure about you guys but after fiddling around with the settings it worked after I changed the "S/PDIFoutput sample rate" from 48 to 96 khz. I have no clue what I did, but it worked for me. I am running logitech something or rather speakers with VIA HD audio deck drivers

SOURCE: sound is not working on my hp laptop

I had the same problem; my laptop's speakers suddenly stopped working but I could still use the headphones and sound was fine.

I played around a while and searched the net; and I got them to work:

Open Control Panel- Sound, Speech, Audio Devices-------->
1) Audio Tab
2) Under 'Sound Playback' hit Advanced
3) At the bottom where it has Speaker Setup change it to "Laptop Stereo Speakers" (mine was initially on "Desktop Stereo Speakers" for some odd reason)

Problem solved, Thank God (Alhamdulilah)!

Hope it works out for you :)

SOURCE: Less sound on one ear than the other

Yeah, based on all of your problems, i would safely say that you have a blown speaker. Call up Bose at 1-800-999-2673. If the headphones are under warranty (1 year) they will replace them for free. If now, they will charge you $100 for a replacement pair, which is quite a deal considering that the headphones cost $300.

SOURCE: I can't hear out of my earphone's right ear?

get ather pair of earphones, check if ipod is the source of problem or simply the cable of your old phones is broke, to fix that you'll havebe familiar with fusing
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SOURCE: I can't hear the caller on my Blackberry Curve

my caller hears me but i dont hear them unless i use speaker phone how do i fix this