Vizio va22lfhdtv10t no backlight.

Collapse
X
Collapse
+ More Options
Posts
 
  • Time
  • Show
Clear All
new posts

Related Topics

Collapse

  • Tynan Dill
    Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
    by Tynan Dill
    I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

    Upon bringing it home and plugging it up, it showed a standby light.

    I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

    The screen seems to blackout and stay black, but with a flashlight I can see the display.

    With my Playstation 4 connected via HDMI, and running a game I can hear sound.

    Assuming...
    11-22-2024, 01:46 PM
  • m1ch43lzm
    HP Pavilion 15-eh Board DAG7HAMB8F0 - CPU throttling to 0.4GHz (PROCHOT_EXT) and black screen
    by m1ch43lzm
    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...
    05-12-2025, 08:37 PM
  • C152Heavy
    Samsung LN46C630K1F – Intermittent Backlight, BN44-00341B Power Board
    by C152Heavy
    Samsung LN46C630K1F – Intermittent Backlight, BN44-00341B Power Board

    Summary for TL-DR readers:
    • Backlight is intermittent, may come on with TV boot or not. No flickering, never fails during TV on.
    • Have obtained Samsung schematic & service documents - Can upload if helpful.
    • Have read ALL applicable threads
    • C1818 and CP820 replaced as low hanging fruit
    • CN802 data taken for normal and failed BL operation. SUMMARY: Pin 2 - 5vDet = 3.52 @normal, 0.0 @BL fail. Pin 6 - EPWM = 1.631 @normal, 1.058 @BL fail.
    • VCC pin (18) of PFC...
    01-11-2023, 02:53 PM
  • Document Archive
    Design of CCFL Backlight Inverters with Frame & Bar Cores
    by Document Archive
    Design of CCFL Backlight Inverters with Frame & Bar Cores

    Summary

    Portable devices, such as notebook computers and personal digital assistants are developed rapidly nowadays, which places an increasing demand on display technology. The LCD with cold cathode fluorescent back lighting satisfies the requirements on display performance, size and efficiency.

    The backlight inverter plays a crucial role in supplying the power to the lamps of these flat-panel displays.

    The frame and bar ferrite cores, described in this brochure, are especially designed...
    10-07-2024, 04:26 AM
  • howardc64
    A1312 (27” iMac 2009-2011) A1407 (Thunderbolt Display) A1316 (Cinema Display) Display Black Screen Repair
    by howardc64
    Problem

    This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....
    08-04-2024, 10:36 PM
  • Loading...
  • No more items.
Working...