Question about RCA RS2620 80-Watt 5-Disc Shelf System Shelf System

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No audio at all and buzz in the speaker output.

Well the subject line summarizes the problem. Everything works but there is no audio anywhere to be found on the main board but the power amps work fine.

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Sounds like an input device switch is frozen or locked up?? try unplugging for overnight and taking any clock or battys out of the unit as well.

Posted on Apr 03, 2006


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Posted on Jan 02, 2017


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Tv repair.for plasma tv

No screen boards found. Do you mean any of these?
Types of TV Boards Every TV uses a collection of various boards to perform every function imaginable in a television. The boards work together to produce sound and images on a television screen. When certain mechanisms in a TV fail, it might be time to start testing different boards to see if they are functioning properly.

Main Board

The main board is the central hub of a television circuit system. The easiest way to identify a main board is to find the board with the various video and audio inputs/outputs. Generally speaking, main boards also contain a tuner, HDMI, USB, and S-video port. Main boards are one of the largest boards in a television. Main boards might also be referred to as a motherboard, main module, or an A/V board.

Power Supply Board

Another large and important board inside a television is the power supply board.. Usually found in the center of the TV, the power supply board has several connectors that supply power to the other circuit boards. It can contain transformers, large capacitors, and integrated circuits. There is usually a table on the power supply board indicating the different voltages it produces in addition to the signal names.

Inverter Board

Found on LCD TVs, inverter boards are used to mount the LCD backlight. These are smaller boards, usually shaped like long thin rods. If an LCD TV's screen is dark, distorted, or difficult to see, it can be the result of a defective inverter board. Inverter boards fail when inadequate power is not allowing current to pass through the backlight bulb.

Timing Control Board / Logic Board

The timing control board, known as the T - CON board,, is typically only found on LCD and LED TVs. Plasma TVS, on the other hand, use a logic board.. The functions of the logic and T-CON board are similar, as each functions to digitize the information it receives from the TV's processor. This allows the screen to display images on the pixel level. When the T-CON or logic board fails, the screen images may become distorted, leading to pixelation and the appearance of lines on a television. On a logic board, there are slotted connectors on all four sides, while T-CON boards have connectors on just two sides.

X-Sustain and Y-Sustain Boards

Also known as the X-SUS and the Y-SUS, the x-sustain and y-sustain boards only appear in plasma screen TVs. The x - sustain board might also be called the Z-SUS. These boards function similarly, producing proper screen images. Although they serve pretty much the same function, the two boards work independently of each other. The x-sustain board activates all the display lines at once, while the y - sustain boardaddresses all the individual lines of display. When one board breaks down, it probably will not affect the functionality of the other. However, it might be a good idea to have both replaced because X-SUS and Y-SUS boards have a relatively short life span anyway. A failure of one could mean an impending failure of the other.

Buffer Boards

B uffer boards are also only found in plasma screen TVs. Connected to the y-sustain board, a buffer board works to turn output to the plasma display. Common defects of buffer boards include the burning and shorting of power lines.
TV Boards Buying Guide

Nov 28, 2015 | Hitachi P50H401 50 in. Plasma HDTV

1 Answer

What is the most common problem for no sound on this model of tv, I have replaced the power board and also the main board in this tv and still have no sound

Check its speaker/s first. If found OK, check and replace damaged component/s at its audio output section circuit. Check whether there is picture. With almost all modern TV circuits, there will be no audio, if there is no picture. Keep this in mind.
If you wish to get some details, check the site linked here. Surf the site in "MOSAIC" view. It will make surf easy. Surf the site with patience.

Jan 25, 2014 | Toshiba 26AV502U 26 in. LCD HDTV

1 Answer

Canon imageclass 4412 E301-0001 error message

Wish I had better news, but the information I found on this says, "E301-0001 Insufficient light intensity in shading" - the details I've summarized below. See the website listed for a full list of error codes. Best of luck with it!

-------- Quoting --------
When the same error repeatedly occurs after several times of turning the power OFF/ON, execute the following remedies.
(1) Check the connection of Flat Cable between Main Controller Board (J5) and Contact Sensor.
(2) Replace the Flat Cable between Main Controller Board (J5) and Contact Sensor.
(3) Replace the Contact Sensor.
(4) Replace the Main Controller Board.
----------- End Quote ------------
Sure hope its just a loose cable...

May 17, 2012 | Canon Office Equipment & Supplies

2 Answers

My sony STR-DE345 amp says "protect" and there is

The manual says it thinks there is a short circuit on the amplifier output side. If it still says Protect after disconnncting all the speakers wires there is an internal problem. Take it to a hands-on tech.

If the problem disappears, you had a short. Attach speakers one at a time to isolate the cause.

Dec 24, 2010 | Sony STR-DE345 Receiver

1 Answer

No sound. Audio is setup and all is turned on. Everything works perfectly except NO SOUND AT ALL. The TV volume is up. The Remote operates the volume too but NO SOUND

You may have either failed sound processor or failed power amplifiers that drive the speakers, since you know for sure that the speakers are not set to OFF. You need to attach a set of PC powered speakers to the Audio line out RCA JACKS to see if you do get the sound OK, if you do then the power amps are bad, if not the sound processor is bad, either way, the new main board needs repairing and it will not be cheap. If the sound works through the RCA AUDIO out, you may want to keep using it that way.

Jun 16, 2010 | LG 42LC2D 42 in. LCD HDTV

2 Answers

I have a Westinghouse LCD TV model LTV 27W6 HD. TV is 1.5 years old and once TV it turned on everything works fine. After 10 - 15 minutes of operation the video changes to colored horizontal lines. The...

TV should be looked at by a qualified technician. The problem could be in the Power Supply PCB, Main PCB or Tcon PCB. Using cold spray is the quickest way to determine which board is faulty.

Sep 09, 2009 | Westinghouse LTV-27w6 27 in. LCD HDTV

1 Answer

Stopped working

I had a similar problem with a jvc 8040. when I replaced the fuse it became very obvious that the b1560 output on the center channel was blown (smoke and sparks, always a dead giveaway). I haven't fixed the center channel yet but simply unplugged the center channel board and removed it from the unit. Now everything works fine except of course the center channel. Pre outs still operate just fine so a slave amp could be used for center channel power, or you could just go and buy a marantz amp; I did and then I realized that I was lucky that the old jvc quit.

Jan 27, 2008 | JVC RX-1028V Receiver

1 Answer

Sub quit working, where do I find new board/amp/crossover panel

I have the same problem with mine and since Acoustic Research went out of business, I too have been looking for a solution. I may have found an alternative to throwing away this really nice speaker. I found a company on the web that appears to sell an amp that may fit nicely into this speaker enclosure for $99.00. Check it out...

UPDATE Feb-16-2016: This Amp is still going strong since 2012 when I replaced it. The price has gone up to 139.00, but may still be worth it to replace a bad one given the cost of Sub's today.

Nov 26, 2007 | Acoustic Research S112PS Subwoofer

1 Answer

Hifonics 1605

have you checked Radio Shack? they have a lot of cicuit board stuff for soldering

Apr 26, 2007 | Hifonics BX1500D Car Audio Amplifier

1 Answer

Smoking Amp

yes let me see the pics my email is


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