Try our new boardview, bios, & schematic search. Over 1.3 million files for download!

Need FIRMWARE: RCA 55120RE01M3393LNA35-C1 MAIN BOARD FOR LED55C55R120Q

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • oz_13_ms
    New Member
    • Jun 2019
    • 3
    • US

    #1

    Need FIRMWARE: RCA 55120RE01M3393LNA35-C1 MAIN BOARD FOR LED55C55R120Q

    Hello all!

    This is my second post after recently finding this website while browsing for downloadable firmware referenced in the title. As the title states, I am looking for firmware for RCA 55120RE01M3393LNA35-C1 Main Board, which I am in the process of replacing. Can anyone help me?

Related Topics

Collapse

  • Dani_2024
    Sceptre U550CV-UMR 4K LED, Bad Caps on Main Power Board?
    by Dani_2024
    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...
    10-28-2024, 05:06 PM
  • ygorsan
    LG 55NANO77SRA TV – Menu scrolling by itself even after removing button board (Main Board EBU66792103)
    by ygorsan
    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
  • tvguy12012012120
    Picture degrades over ~2–3 minutes (washed out / low contrast) – panel vs T-CON/FRC vs main board diagnosis help
    by tvguy12012012120


    I’m troubleshooting a Westinghouse WD55UW4620 with a strange, very repeatable failure mode and I’m looking for insight on whether this points to the panel itself, T-CON/FRC board, or mainboard.

    Any ideas as to what would cause these symptoms?

    Symptoms:
    • From cold power-on, picture is perfect.
    • After ~2–3 minutes, the image slowly degrades:
      • contrast collapses
      • colors wash out / look incorrect (greens especially bad)
      • image looks “milky” / flat
    • Turning the TV off for a few minutes fully resets it; behavior repeats almost exactly each time.
    • Internal
    ...
    01-07-2026, 03:30 PM
  • jb_Bak
    Sony xbr-65x900c main board issues?
    by jb_Bak
    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"...
    09-27-2021, 04:52 PM
  • JDC
    (SOLVED) - ONN 100012588 No Power, Then Rebooting After Main Board Change
    by JDC
    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....
    07-15-2022, 07:39 AM
  • Loading...
  • No more items.
Working...