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Re: Technika LCD 19 DVDID-208 (Vestel)
All capacitors on the PSU board & the 470uf & 1000uf ones on the tuner board have been replaced, still no Text - aerial fine on other TVs - all modes.
The signal strength shows zero, so perhaps the problem is a faulty tuner - perhaps suffered a nearby lightening strike?
Anyway, I think that is about it for the learning exercise on this dodgy Technika!
Thanks though for your replys.
BobComment
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Re: Technika LCD 19 DVDID-208 (Vestel)
remove the tuner and try with video-input if you think it's tuner related.Comment
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Re: Technika LCD 19 DVDID-208 (Vestel)
Hi there, I'm fairly new to DYI tv fixing. I got a TECHNIKA LCD19DVDID-108 and suddenly while trying to reprogram the channels it stopped working. The screen went off and the red standby led started blinking every time I turn it on. No sound no signal and no screen light. Reading over the internet I read a common fault is a blown PSU so I bought a replacement. Surprisingly when I opened the TV set, the TV's PSU seemed ok. Nevertheless I connected the new one, (without the lamps, the new psu came with different molex connectors), however it still did not work. I'm attaching a some pics of the original PSU. Any help would be greatly appreciated!Attached FilesComment
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Re: Technika LCD 19 DVDID-208 (Vestel)
This sounds like a mainboard issue rather than a power supply issue can you put the original power supply back in and take the dc voltages from the large wiring connector has the wiring connector got any writing by it too say what each pin does/is for? and Dont try too measure the smaller lamp connectors as these are High Voltage and your meter may not survive.Comment
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I suppose the real question is whether the existing pinouts from ether a 17IPS71 psu are cross compatible with a 17IPS12 psu? If they are then the exchange of the main boards should have no issues providing the screen is compatible with both main boards. Obviously you can change the screen configurations easily enough (providing you have the correct files) for the main board. Why may you ask would I do this? Well a lot of the smart features are no longer working on a Hitachi 48HBT62U main board I wish to give it a new lease of life!
Obviously the same LVDS connector for the screen connection... -
Hi and thanks in advance for any input you might provide!
I have a Sceptre U550CV-UMRD8POTV83BB 4K LED (this is a dumb tv) that I bought new in August 2021, so It's just completed 3 years.
Main power board model: TP.MS3683.PC821 T-Con board: N4TP546UHDPU2L_BO
Last Sunday I was watching a dvd and fell asleep for about half hour, when I awoke the tv screen was black and couldn't get the dvd menu to show, so I changed the input to antenna and had sound but no picture, turned it off. I then got online and found this great site! ....read many troubleshooting tips and this... -
Hi everyone,
I’m looking for help with a persistent issue on an LG TV model 55NANO77SRA, which uses the main board EBU66792103 (also used in LG UQ80 and NANO75/NANO80 series).
🧩 Problem Summary:- The TV keeps scrolling through the menu or selecting items by itself.
- I removed the physical button board (the entire panel with power and volume buttons) and also disconnected the flat cable (CN202) from the main board.
- The remote control is not in use (batteries removed), and the TV still shows the same behavior.
- I
07-28-2025, 08:34 AM -
Hey guys great forum glad to have found it. I bought a Sony XBR 65X900C cheaply because it didn't work. No signs of life at all not even a light/led. All I hear is a brief high voltage sound when I throw the power to it.
Didn't see any obvious signs of damage so right away started checking voltages. This is what I see:
Power Board Connector that goes to Main board
CN6401
Pin 01 NC
Pin 02 NC
Pin 03 "BL_ON": 0V
Pin 04 "N/C"
Pin 05 "STBY 3.3V": 3.5V
Pin 06 "GND": N/C
Pin 07 "AC_OFF"... -
ONN 100012588
Issue: No Power, Then Rebooting After Main Board Change
Short answer: replace main board and power board
Technical answer: replace main board and Q306 & Q307 on power board.
Long answer:
TV wouldn't turn on. Power switch was fine which means the main board isn't processing the power on signal. Replaced main board. TV turns on now but randomly reboots. Bad main board? EEPROM? Tried to pull main board and got a shock touching the corner of the board. That's weird. C334 (450V 10uf) capacitor is still holding a high charge....
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