I have a Sharp LC42D43U-42, that has no picture but has sound. Read somewhere that it may be the main board so we switched it out, now the tv comes on, blank screen, green power light and green opc. We read that maybe we need to upload the software for the new main board, but can't find anywhere to download the software so that we can perform the upload to the new main board. Does anyone know where we could find that? Also what is the thought that the main board was not the problem, and that it was the backlight inverter? Prior to changing the main board the tv would come on gray and fade to black, no picture what so ever. Any help or suggestions are appreciated. Thanks.
-
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
If the TV had sound I would be considering inverter or T-con. Was the screen lit up with old board?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search. -
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
Thanks for the quick reply. The picture before the main board was changed was gray fading to black. Now with the new main board, the screen stays lit, more of a dark blue than gray or black, but still no picture. We did switch the inverter, but switched it back, as the one we received we got off ebay and it looked burnt.Comment
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
Sounds like a t-con or panel issue. Can you post pictures of inside your TV?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
I have attached a few pics.Attached FilesComment
-
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
A couple more of the backlight inverter...Attached FilesComment
-
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
I have one like that. Problem is panel , Try to play with scan board on top of tv.
Right side of tv look from front.Comment
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
Scan board? Sorry just learning this stuff and not sure what that is. Is that the board that the tabs are attached to? Should I remove the the outside frame to check this?Comment
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
It takes more work to remove the outside frame . Just cut the black plastic cover
the board then hair dryer to the board . It makes some affect the tab bond ribbon to see any change on screen. Then you know what is the culprit.Comment
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
I am guessing you are saying it may be a bonding issue? Not a board issue?Comment
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
On another note...because I installed a brand new main board...where can I get the software/firmware to update the board for this tv?Comment
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
I have a 26" Sanyo (rebadge) using a Chimei panel, which has tab bond issues. Sometimes all you will get is a dark (no image), lit up screen, with a dark blue tint. Other times you'll get a faded light grey screen which slowly changes colour.
Different fault. Same cause and fix:
https://www.youtube.com/watch?v=purk_SyiT44Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
Tom...I have watched that video before...do you think that this Sharp has a similiar issue then?Comment
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
It would be one thing to check, as the symptoms are similar to other tab bond faults. Sharp panels (like in your Sharp TV) rarely have tab bond faults though. Not unheard of, but rare. Since the swap of the main board changed the symptoms, I would not rule out a main board fault. Possibly the replacement main board is bad too, given they are usually pulls from scrapped TVs.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
The main board I bought was suppose to be brand new unused. Do you think I need to update the software/firmware in order for the main board to work correctly?Comment
-
Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
It was suppose to be for the same exact model, and was suppose to be brand new unused. The part numbers on the board say the same part numbers, but what I have read online says this board may need software updated after installation.Comment
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
It's worth a shot, I guess -- can you do it via USB?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
I want to...but I can't find it anywhere online. Any ideas where I could find that?Comment
-
Re: Sharp Aquos LC42D43U-42 Has Sound but No Picture
You can try contacting Sharp tech support and they may supply you with files and instructions. Does the TV have a USB port?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Hi all
I was just given a Samsung TV with the issue. I read various threads and videos and attempted the ribbon tape method to gain an image, but no luck.
Symptom:
No picture no sound.
When I plug in the power cord, Backlight LED turns on for a half second and then turns off. The red LED next to the power button located center bottom flashes 2 or 3 times. When the power button is pressed after, it does the same thing.
No sound at all.
What I tried:
1. I tried unplugging the left or right ribbon... -
so i took out one of my spare gigabyte ep35-ds3r mobos from storage for use to do some cpu, ram and video card testing of stuff i bought from ebay and got for free from momaka. he bought 50 e8400 cpus for cheap from ebay some years ago and i decided to help him relieve him of some of his supply since he had waaaay too many!!
what did we say about hoarding too much stuff and depriving others of them?! *cough* socialism *cough* lol! 
i had to blow some dust off the board and heatsinks with the datavac as i didnt clean it up before putting it in storage. after finishing... -
I've got a pretty loud hissing sound that I think is coming from my TV's main board. This sound is constant and doesn't seem to change once the TV has warmed up. It is there when the TV is on and when it is in standby mode. The TV is working, but the noise is loud enough that I can hear it even when it is playing audio. Does anyone know what the issue is and how I might be able to fix it? -
Hello, i am working on Vizio M70-C3. It can hardly power on, it takes 15 power button presses or remote. Seems like eeprom problem that I seen before but all reading online says that this tv has power board or main board problem.
When tv powers on vizio V logo shows nice on whole screen. picture 1
When it goes into tv mode it only shows good picture on left side of screen, right is all scrabbled up. pic 2
When i start youtube picture shows on left side fine, right is all scrambled. pic 2
When i click video to start playing picture goes black(like when you change... -
Hi community,
I will describe my problem with a TV in those short following terms to be the most precise :
What i have :
Sharp Aquos LC-60LE635E
power board DPS-162KP-1
main logic board QPWBXF733WJN2
symptoms :
white led light logo at startup,
after 2 minutes, blinking 3 times a row, repeating
no backlight (and apparently no picture, checked panel with flashlight)
no startup sound
powerboard investigations :
1-2 PNL : 0v
3-4 GND
5-6-7-8 UR : 13.15v
9-10-11-12...
Comment