Model #57733 - Volume will randomly increase without notice. Remote control no longer communicating. Have tried the reset button.

If the remote controller is not at fault by randomly sending packets of commands, clean/replace the manual switched on the tv.

Is there a laptop near by? Some (most older) laptops, can send out infra red codes. Used for infra red communication with hardware. I once was shocked when my lights went on and of without any cause. Till I found my very old laptop did so, when I used certain buttons.
Perhaps even another remote control is sometimes giving the right code, just to switch on?

volume button on your remote is stuck in the increase position. try another remote if possible or remove the remote batteries so you can atleast use the TV manually

Main system control memory IC fault. This is a very small IC; have 8 solder terminals, and can be located very near to the main system control-chroma IC. Check and replace it. Be sure to replace it with the same number printed on it; in all respect. Otherwise, it won't go. http://electronicshelponline.blogspot.com/ Before replacing it, try a reset to this set, and then check.
There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here.

The volume (+) button on the TV is stuck or soiled if the volume automatically increases when the TV is turned on. To find out:

1. Turn off the TV.
2. Press and hold the volume (-) button on the TV then turn it on.
3. If the volume doesn't automatically increase, you have a stuck button.
4. If it does increase, you have a faulty key control board.
5. In either case, you have to replace the key control board.

To find it out further:
Warning: Beware of electric shock.Please do not proceed if you do not have the skill to do the following.

1. Unplug the TV.
2. Let it stand for 15 minutes to allow voltages to drain completely to avoid the risk of electric shock.
3. Remove the screws securing the TV's back cover and pull it off.
4. Disconnect the cable that runs from the main board to the control key board.
5. Turn the TV on using the remote.
   
6. In this manner you can use the remote control to run the TV while waiting for the control key replacement board.

To do a hard reset of the TV, unplug it and let it sit for 2 hours or long enough to completely drain the internal voltages.

YOUR VOLUME BUTTON MYBE STICKING I NEED TO KNOW THE MAKE AND MODEL ON TH TV

sounnd like your power supply
check you cap,s in power boulg cap.s

yes direct into the buttons the WD40 is the best thing i've ever seen, that will not damage anything you can spray it without fear and then try to activate the buttons a few times, of course with the tv off.

MEtten,
Flip the top cover, just above the "AV MENU" there is a round boll kind of switch, it has to be pressed when you want to function top cover button, so may be it is warn out or the nob has been broken. if you press that switch with pen nob it will function...

It is bad design...

Surendra