Toshiba (Model : 36A43) - volume goes down automatically

Try removing the batteries from the remote. Then adjust the volume from the tv panel. If the problem is resolved, then it sounds like you may have a stuck remote button.

I am having same problem on 32 inch same problem. After playing with board with no results,I tried front buttons and found that if I held the power button in ever so slighItly as not to turn it off, it fixed problem which is the micro on/off switch, I removed the switch and used the remote and everything is back to normal, I am about to insall a used micro switch after I finish typing this but I am sure this will clear up volume problen and menu going crazy problem if not I will just leave micro switch out and use the remote, and I will get back to this board only if that micro switch still causes the problem, so if I don't post in next hour the problem is fixed and I'm more than glad to help.

I have the same problem, my bar goes down to 0 as soon as I try adjusting it