Re: Telefunken 40DTU652 No Sound, no image, no backlight.
Thank you very much for answering. Do you think that the symptoms are compatible with the main board? a question, perhaps absurd. To flash, is it done through usb? or should the nand be desoldered? I'm a beginner, so I'm interested in buying a new main board. if i buy a new main can i buy any make and model of tv? I don't know if it should be exactly the same model. I don't mean the motherboard model, I know it must be 17mb130s
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Re: Telefunken 40DTU652 No Sound, no image, no backlight.
search the forum.. download and flash firmware yours mainboards label vestel 17MB130SLeave a comment:
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Re: Telefunken 40DTU652 No Sound, no image, no backlight.
somebody could help me?Leave a comment:
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Telefunken 40DTU652 No Sound, no image, no backlight.
good evening! I have this tv with the following symptom. The tv is in standby, you turn it on, and the led blinks until it seems to start, but there is no sound or image or backlight.
When it is started for about 5-10 minutes, it goes back to standby by itself. I have taken voltages at the rear light output. with the back light connected, in standby there is 50v on the black wire and 0v on the red wire, and when you turn on the tv the voltage rises to 100v and stabilizes around 80v, with a return of 8v. The problem is that from time to time this voltage is lost and it is not stable. If you unplug the taillight the same thing happens.
I have taken output voltage measurements at the source, having 12, 5, 3.2 and 24v on and 8 and 1.4 v on standby. I am doubting the main, when the instability occurs with the rear light connected and not connected. the fixture has a 17mb130s main and a 17ips72 power supply.
Let's see what idea you can give me, very grateful in advance
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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... -
PSU - BN44-00878A
Symptoms:
The TV turned itself off, and I haven't been able to turn it back on. The standby voltage was unstable and lower than it should be.
A weak clicking sound was coming from the transformer.
Video with clicking sound:https://www.youtube.com/watch?v=lAduhjNtqCA
Progress:
After the transformer, I measured four Schottky diodes. DM862C and DM864C diodes readings were 003 in both directions. After detaching them from the circuit and measuring them, DM864C was the shorted one. These Schottky diodes are SB550.I... -
Hello,
at tv KD - 65XF9005 i have a problem.
Afrer a coupe of minutes (10-30) i got black screen, no image. But i have sound.
is this a common problem for this tv?
i attached pictures of inside. Supply board looks okey, no blowed caps.... -
Hi, my TV image started showing those lines and the image faded away, but sound is still coming from it, what could be the cause and is it fixable? I thought it could be the tcon board but I red on the internet that it could be a failing panel
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Similar to another LG UK series here
https://www.badcaps.net/forum/showthread.php?t=93943
Have backlight and sound. no LCD image.
- main board has integrated T-Con
- main board T-Con has LCD DCDC/PMIC RT6950GQW QFN68 package. Richtek chip. Can't find datasheet. Chip generates VADD (10.44V), VGH (~28V), VGL (~-14.5V)
- RT6950 pin 18-19 (clockwise) appeared to be bridged. Unlikely from my probing, looks like ball squeezage so it probably got hot
- Cleaned up bridging. Pin 17 is VGL (-14V) Pin 20 is VGH (28V). Pin 18 (I think 19 too) jumps between VGL and VGH voltage
Leave a comment: