Samsung lcd tv volume goes up and down on it's own

SOURCE: Volume n my tv keeps going down

same

SOURCE: Samsung 50 in Plasma volume Problem. Please help!

In the menu, there should be an option for AUTO VOLUME, see what this is set at, change it and see if it works. Also there is another option for INTERNAL MUTE, though I still haven't found out what it's for, myself. Give both a go. If neither of these work, try looking at the support pages on the Samsung website. Other than that, I can only suggest you take it back to where you purchased it, and ask for an exchange.

SOURCE: The volume control is stuck

samsung web site has a firmware upgrade for this problem.
but I tried this and this does not work as the version is the same.
http://www.samsung.com/us/support/download/supportDown.do?group=televisions&type=televisions&subtype=lcdtv&model_nm=LN40A650A1F&language=&cate_type=all&dType=D&mType=FM&vType=R&prd_ia_cd=02010100&disp_nm=LN40A650

SOURCE: samsung lns4041dx/xaa

Same problem with my set. The volume was either fully up, or fully down (usually down), and other controls didn't work- like I couldn't access the menus and could not adjust the width of the screen/aspect ratio.

I lived with it for about six weeks, then took the back off the TV. Just now it seems to be fixed, but I don't know if it will last.

I disconnected the wire leading to the channel up/down, volume up/down and source board, turned on the tv, turned it back off, reconnected the cable, and everything seems fine now.

SOURCE: Samsung LCD Flat Screen TV LN-S2651D - Volume Problem

I lived with it for about six weeks, then took the back off the TV. Just now it seems to be fixed, but I don't know if it will last.

I disconnected the wire leading to the channel up/down, volume up/down and source board, turned on the tv, turned it back off, reconnected the cable, and everything seems fine now.