I own a 42" flat screen tv and the volume doesn't go very loud..why and how do fix it? I have a 30" that does the same

Audio amplifier failing or poor connection on board when hot. replace main board.

Based on what you have tried if a buzz or loud static via the speakers you have something wrong in the audio output circuit of the set--problem here is that circuit may be part of the Main board that processes all signal---a look inside---following the speaker leads back would lead you to that board.

A simple thing to do to narrow it a little (you may have done this) is with sound all the way off put your ear to the internal speaker--hear anything at all like a deep hum?

Depending on age of set and cost of the board likely bad it may or may not be a do it yourself repair.

SD TECH

take the batteries out of the remote and make sure its not the remote doing it

UNPLUG FOR 30 sec and reset

Samsung states - A buzzing sound from your plasma TV is normal. It is caused by the electrical charges used to create the images on the screen. The buzzing, however, should not be so loud that you can hear it when the volume on the TV is set at normal levels.It is also important to determine the type of buzzing sound. A sound like a ground hum is completely normal. This buzzing can originate near the power cord connection or from the SMPS board position on the upper back of the TV. The buzz will be more audible as contrast increases on the screen, most notably when displaying an all white screen. If the buzzing sound is loud, you may have the Contrast set too high. Lower the contrast to reduce or eliminate the buzzing.You may also have loud buzzing if the rear of your Plasma TV is too close to a wall or other hard surface. Try moving your TV away from the wall until the buzzing is minimized. [1]
If the buzzing is at a higher frequency and resembles a crackling sound (like the sound of Velcro being pulled apart), and originates from the upper middle back of the TV, you likely have a failing SMPS board. Place a support call with Samsung to have the SMPS board replaced.FP-T5084 Have a known buzzing problem with a very simple fix.If the buzzing is coming from the left or right sides of the rear and the volume can be changed by pressing lightly on those locations, you are probably hearing the vibration of the grounding springs on the back panel. Call Samsung (or whoever) and have a technician confirm the problem. The easiest fix is to insulate the offending spring by applying some felt tape.

Very likely the volume setting on your cable is set too high. The cable volume is separate from the TV volume. Once you lower the cable volume, then you can adjust your TV volume to find a happy medium that gives you more range between numbers. Have you already tried this?

Hello! I have a 32" Vizio LCD...within 30 minutes of the tv being turned on, black lines start running through the bottom half of the screen and eventually blacking out the bottom half of the tv screen. It also doesn't have anything to do with the ratio as I have tried that. HELP!

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.

I am a Sharp servicing technician and I have seen this "problem" with this particular model many times. I have tried replacing the Main Board and the Terminal Board and it does not help. The reason i put "problem" in quotes is because I came to the conclusion that this is model is just not that loud. However, a few months after the initial production run, BAM, these TV's are as loud as any other TV on the market so sharp must have caught onto this.

Hello

If it is just not functioning for volume but do perform other functions then do open in there would be screws or can just be lock's clean the board and pad with cotton dipped into acetone if you don’t have acetone just use the dry cotton if it still doesn’t work change the remote

Good Luck