I don't think this is the case. as i have said, my friend has the same laptop and the sound works whenever i put my friend's hard drive into to the laptop and the sound doesn't work when i put my hard drive into his.. As the subject states, i often turn off my laptop with my headphones still plugged in, and when i start my laptop the next time i use it with the headphones still plugged in the sound goes through my headphones only, and will not play sound through my speakers once taken out. it is as though they are muted.. About a day back, i had sound problem on my lenovo laptop. so i came to your website and tried some stuff. but later i found, this problem was related to sound card. so i bought a usb sound card, and installed it into my laptop, then i tried to play a video. it was giving me awesome sound..
Solved my lenovo u400 laptop won't recognise my tv through hdmi forum sometimes my gpu wont play sound through my tv forum no sound through hdmi, from my laptop to my tv.. My dad's friend did some work on my laptop and it used to play sound and music but now when i plug in head phones or speakers nothing comes out.. Each model of computer has drivers specific to it, and you need the most up-to-date lenovo drivers to troubleshoot lenovo issues. this is especially important for lenovo computers that have sound buttons built into the lenovo hardware itself..
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