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Avol ALT4231M B.TRTD5C CVT-LF LCD TV Main AV Input Board

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Posted on Jan 26, 2009


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1 Answer

LCD TV diplays blue screen on all inputs

Nothing on all inputs would suggest the Main AV board not processing signals, if all other functions such as volume, menu access, on and off operate normally the power supply board is probably functioning OK. Have a look at shop jimmy for an idea on price and availability for Mitsubishi LT-46144 Boards and spare parts:

TV Parts Universal TV Stands DLP Chips ShopJimmy

Dec 11, 2015 | Mitsubishi LT-46144 46 in. LCD HDTV

1 Answer

Suddenly, all three HDMI Ports won't receive a signal. Help!

Hi James,
The main board of your TV is not accepting HDMI input. You can use another AV input to watch the TV or you have to change the main board.

Aug 04, 2015 | LG 42LG30 42 in. LCD HDTV

1 Answer

When I hook up DVD player to 32inch LG television there is no color on the TV it plays in black and white. Why?

first check color level setting on the tv when on av source input. double check input you are using, yellow video input (not green)
then try another device in that same input, then try the DVD player on another tv. The problem will be either DVD player or incompatibility or bad main board in TV, but usually a DVD or compatibility problem(cheap DVD player)

Mar 22, 2015 | LG 32LD450 32 In. LCD HDTV

4 Answers

I have an AVOL 42" flat screen TV has no picture. Is there a Master reset?

Hi, It also could be BAD capacitors on the back of the TV. Most likely on the main power board. You should not attempt to do this yourself unless you know something about electronics. Please take it to your local repair shop. No, there are no reset buttons to push. If the cost of repair is too much. Go buy a new one. They are alot cheaper now. good luck.

Jan 23, 2015 | Televison & Video

1 Answer

Samsung ln83241d lcd

Does this input work with a dvd player . If so replace the cable box. If not replace the main board on the tv. Also if this is an older tv that does not support 1080i you may have to connect box to av input and lower the resolution of the hdmi output.

May 30, 2013 | Televison & Video

1 Answer

Need to reset

23" UMC LCD TV PART MAIN AV INPUT SMALL SIGNALS BOARD no sound m0del m23/28e-gb-ftcup-uk

Dec 03, 2011 | RCA HD61W66 61" Projection HDTV

1 Answer

Vizio sv420xvt when turned on no blue screen,millions of red and yellow dots.Need to know what board to change and hope it is not the lcd panel


You cannot know what board is involved without testing the TV. Testing requires skills and training.

The faulty board is likely the digital controller board(Vizio 3642-0492-0150), which is the main board inside the TV.

Before replacing the main board, the Power Supply and the must be tested.

On this 42'' there is also a Daughter Bd Assy, and T-Con Board that must also be tested.

Testing is done at component level, mainly reading volts in strategic points and checking components for continuity.

Here a general procedure explaining how to test the power board. Disregard the part on inverter as this is unlikely responsible for the symptoms you have described:How to test an LCD TV or monitor PSU

Regarding inputs, this can also be responsible, and may be tested by simply using the TV on different connections. Here the boards :HDMI Input, and AV INPUT .

Before doing anything else call Vizio at the number listed on the owners manual, to verify warranty status and to check the factory quote on repair.



May 06, 2010 | Televison & Video

1 Answer

My tv has color waves going through the screen when i have av turned on. it only works with tv not av.

this is usually a phenomenon related to high power output devices being nearby. IE computer power supply, or a backup source that needs to be replaced. It can also indicate failing components inside on the main board or on the power pack of the tv. Since you say that it only works on the tv input the video board would be my first place to look.

Jan 31, 2010 | Coby TFTV2224 22 in. LCD TV

1 Answer

Aquos LC46D64U, problems with av input video signal

You know, I've had two repair instances regarding this particular model line (D64U) where there were problems with only the analog inputs (such as the component/composite).... but with no problem with the HDMI inputs.

Replacing the Main Board fixed these TV's. Since both the Xbox and the Wii present the same problem on two separate inputs, this leads me to believe you most likely have a defective Main Board. If your TV is still under warranty, I suggest calling Sharp to locate your local authorized service center.

Mar 11, 2008 | Sharp Aquos LC-46D62U 46 in. LCD HDTV

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