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I dismanteled the LCD panel and could check the LED stribes. These are edge stribes with the number for L/H G1LE-400SMC-R6 and for R/H G1LE-400SMD-R6. Unfortunately they are NOT defect.
@jvezina: I couldn’t find any sticker. But I have to say that I didn’t remove the last layer. Nonetheless I could remove the two stribes.
Can you find a part number somewhere, search for another brand TV in which the panel is used and then find a YouTube video to explain dismantling the panel itself?
Does anybody know where to look for the part number in the Beovision 7-40 MK6?
EDIT: This video was also quite useful: https://www.youtube.com/watch?v=77tymvTJDxo
This video is quite interesting for my repair attemps. I have to look at the video a couple of times. Despite this is a B&O Beovision there is a SAMSUNG LCD panel inside. I don’t know which one but the video is great.
Thanks a lot. Michael
… Check the service manual for the Beovision 7-55 that has LEDs.
I don’t know where to get the Service Manual for the 7-55. In Beoworld.org there is only a user manual available. Any proposals?
… But before, checking if the 24 volt supply to the inverter is present is the first step…
That is maybe a problem. Because the Mk6 has no CCFL but LEDs there is no inverter but a driver board. And I think when one or more LEDs are not working, the whole panel gets no power (24V) for safety reasons. I am not sure about that but I am quite sure.
As I wrote above: PCB03 P005 Pin2 should be 5V but is only 3V!
my 7741 has also trouble with the backlight. Someday during televison the screen went black and never get back again. I sent the TV to my dealer for repairing but he couldn’t fix the problem. So I got the TV back unrepaired.
I read a lot of backlight problems and also watched a lot of youtubes about this topic. In your comment it sounds that you maybe fixed a problem with the backlight by yourself. Do you have any suggestions to dismantling/disassabling the TV in order to get to the LED stribes?
Meanwhile I checked most of the DC voltages of the PCBs compared to the service manual. So far I found only one DC voltage which should be 5V but it was only 3V (PCB03 P005 Pin2).
Thanks in advance Michael
Hat jemand für den oben genannten BeoVision 7-40 3D (Typ 7741) ein Service Manual? Kann auch in Englisch sein.