Samsung LE26R74BD plasma sreen tv sound problem

plasma tvs buzz a lot, depending on screen brightness. its probably normal but if you can hear loudly over your volume, may be a bad board or plasma panel. from behind tv, left side = y board, right side = z board, middle = power board ---- bad panel can buzz from anywhere... if you hear all parts buzzing, its probably normal plasma noise

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.

I would take it back unless you have time to investigate the problem before the return policy expires.

If the sound is coming from the speakers then it is interference and would likely happen with another TV.

The interference type can be electromagnetic or radio frequency, both of which can be defeated.
Start with plugging it into a different outlet. If that doesn't work, then unplug anything from it one device at a time to see which thing is the culprit. If it is one of the devices, move any audio cords away from power cords and/or position the device further from the television.
Household appliances and fluorescent lighting also can cause signal interference in electronics that is audible.
A device known to help with such interference are power line conditioners from such brands as Tripp lite, and ferrite clamps. You can place ferrite clamps on the power cords of your devices and their analog audio connectors.

You need to adjust the voltage on the Power Board, but small possibility.

I think that need to replace with new Power Board.

The tv plays fine my sreen is cracked on my Sony 42inch screen can some one help me.

Where did you move from and to?

it might sound strange but i think the screen has dropped. I have seen this happen before, is it just one line or 2 as the screen is fitted in the shield, its held by a thin rubber sometimes it can drop when the tv is being moved about or in a lot of vibration like moving it about in a car. now this may sound strange but the last time i fixed one i used 6 match sticks and clean them up and put them in the screen housing and it keep the screen in place after that. but beautiful when removing the screen case as you can inadvertently damage the screen, the screen is only a thick as a bit of cardboard. i suppose you could even put the tv upside down on the bed or something soft and wiggle the screen back into place. this would not damage thew tv and you will not have to take it apart.

I have the same problem I can hear buzzing over the volume of the tv into the 30 range. I've had a tech out 3 times and he's coming out for a fourth. He's changed to power supplies and is bringing the 3rd next visit. From what I've read it has either to do with power supplies or grounding strips.

This is a very easy fix. Your cable box is not grounded correctly. To fix this you need a AC Plug adapter. This will change your TV ac plug from a 3 wire to a 2 wire. This may sound funny, but trust me on this. I have fix a lot of TV in NY doing just this.

Is the sound comming from the speakers on the TV or the back of it? Plasma TV's can doing buzzing sounds when moved to higher elevations.