Sanyo dp55441 Mainboard replacement not working

[Georgia088]

I have a Sanyo dp55441 tv that got hit by lightning. Followed the instructions on this site and determined that the main board was bad (menu screen would display but all sources would say "no signal") The main board was "431C4169L02" I purchased "431C4169L01". I placed purchased board in tv and it will display hdmi source, but the picture is bad. It is very pixilated. you cannot read words even on the menu screen. It will play audio from the source but bad image/video. The "bad board" would show a perfect picture in the menu screen, but would not display any sources. Could this be a firmware issue? if so where can I find the correct firmware for this mainboard? Please Help! Thanks in advance for any help!

[Georgia088]

Re: Sanyo dp55441 Mainboard replacement not working

Does anyone have any advice as to where to go from here? Thanks!

[dick_barton]

Re: Sanyo dp55441 Mainboard replacement not working

Do you know if the board was set up to run the panel in your set. If you go into service mode and check what panel has been selected.
I don't know how you enter service mode but a search of the forum will probably have the answer.

[tw2005]

Re: Sanyo dp55441 Mainboard replacement not working

I would think same. So far just looking at Shopjimmy,

Sanyo CL461C4169L01 (431C4169L01) Main Board for DP55441 P55441-00
Panel Sticker Number: T546HW01 V.1
Panel Manufacturer: AU Optronics

Sanyo CL461C4169L02 (431C4169L02) Main Board for P55441-01
Panel Sticker Number: LC550WUD-SCA1
Panel Manufacturer: LG Display

Sanyo 431C5469L02 Main Board for DP55441 P55441-03
Panel Sticker Number: T550HVN02.0
Panel Manufacturer: AU Optronics


Chance this one may work as it has the same panel.but I honestly don't know.

Sanyo 431C5469L03 Main Board for DP55441-04
Panel Sticker Number: LC550WUD-SCA1
Panel Manufacturer: LG

[dick_barton]

Re: Sanyo dp55441 Mainboard replacement not working

Georgia088
Can you confirm the Panel details of your set normally found on a sticker inside the set.

[Diah]

Re: Sanyo dp55441 Mainboard replacement not working

LG panel and AU had huge different video calibration data... on yours pervious post https://www.badcaps.net/forum/showthread.php?t=55745 i gave you link to how to inter service Menu and make sources calibration

[Georgia088]

Re: Sanyo dp55441 Mainboard replacement not working

Thanks for the replies! I went in to factory mode and did a nvram reset and a source calibration but no change. It still says ng.

I can put original main board in and picture looks just fine. Just says "no signal" when each source is selected. When newly purchased board is out in it is very bad picture (in legible) but will display a sources picture.

Please help!

[ozzy214]

Re: Sanyo dp55441 Mainboard replacement not working

Souunds like you will have to buy a board from your panel