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Re: LG 50UH5500-UA - No picture
I only need one bar, someone could give a tip where can I buy?Comment
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Re: LG 50UH5500-UA - No picture
I will check at my shop tomorrow and let you know if I have it. Could you give me the Part number of the one you need.Comment
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Re: LG 50UH5500-UA - No picture
Nice thread, so in this model it looks like it failed the flashlight test BUT was still a bad led in backlights, that's GOOD info. and should help a lot of people with similar issues.
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Re: LG 50UH5500-UA - No picture
I don't even do a flashlight test. If a LED TV fails to turn on without backlight or backlight flashes on power up, I will suspect a bad LED and can probe the LED connection with my LED tester or open it up. LG LN, LA & LB series, Samsung EH and H series, any RCA, Hisense, Haier, or Insignia. Currently 2014 model years are the most common.Comment
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Re: LG 50UH5500-UA - No picture
I've had two of these same LG's. Identical symptoms. No image with flashlight. One LED failed open. Unless you are fixing the TV for yourself, I recommend replacing the full set of backlights with NEW. 10% savings at shopjimmy through the end of April. And reduce backlight setting!Comment
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Hi everyone,
Iām 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).
š§© 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"... -
Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic... -
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... -
Schematics for the main board needed please. Sticker on board states BN94-07517A but the silkscreen says BN41-02157B. Cant find here or anywhere on the web.
Backlights work when main boards disconnected. When connected and power button switched, the relay on the PSU board turns on for one second then back off.
While relay is on, all voltage rails are present and steady (scoped) on main board.
I love a good logic puzzle but getting lost without any schematics.
No shorts on ANY capacitor main board.
Thermal camera shows 3.3V inductor getting warm instantly but...10-19-2025, 06:32 PM
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