Bad CCFL pictures

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  • ttmi100x
    HANNSG Hi221 -- 2 secs to black feat. CCFL flicker & "burn" marks on power board
    by ttmi100x
    Greetings everyone,


    I have a HANNSG Hi221 monitor that exhibits two seconds to black issues (backlight goes off, display is still on as confirmed by shining a flashlight on it) with some additional oddities...


    The monitor failed on me with a standard "2 seconds to black" some time ago prompting me to initially replace most of the electrolytic capacitors (some of them were bulging/leaking).
    Things kinda sorta worked for a night, then the problem returned along with some flickering and "buzzing" noises.

    Upon closer inspection...
    "Burnt" resistor
    6 Photos
    07-31-2024, 06:36 PM
  • mikey5791
    Help on Samsung Syncmaster T220 dead ccfl lamp
    by mikey5791
    Hi,

    This monitor previously is my main working monitor which i have been using for 8~9 years. Yesterday, when i switched on my pc from fresh to power on, the monitor is just black no display. I started dismantle to look inside the monitor power board but nothing looks suspicious or burnt. So i took my external ccfl inverter to try to power the monitor ccfl lamps which consisted of 2 lamps on upper part and 2 lamps on the lower part.

    Found out the upper ccfl lamp which is supposed to connect to cn304 on the power board did not light up. Then i installed a used working...
    10-18-2020, 03:17 AM
  • bohaboha
    Samsung UE70TU6905 BACKLIGHTS AND SOUND ON NO PICTURES BUT SCREEN NOT DARK
    by bohaboha
    Hi it looks like everything works don't know where to test except the 390v in the 2 capacitor in the hot side of the power supply and the weird 180v in the diodes in the cold side that should be discharged it is writin on the circuit no more you can read what is written on the circuit quite srrange color mixiing yellow and white
    anyhow i couldn't t read anything else
    the backlight is on strong and the screen does not get dark or very dark but no pictures
    the mainborad feels a bit hott on the black part i test it to 52 degree's against 34 to 40 on the rest of it
    ...
    01-02-2025, 08:04 PM
  • 2elw
    SVOD4 PCB pictures + parts
    by 2elw
    Hey, I find it very absurd that the SVOD4 costs so much and has zero documentation. I had no other choice than to buy it to unlock ECs, if there was any documentation or firmware avalible I could've made it or something simmilar. Anyways here are some of the most important parts:

    STM32H723VGT6 MCU - It's a microcontroller by STMicroelectronics and its the whole brain of the SVOD4. It has flash memory for the firmware which can be updated by the SVOD4 program. Its also powered by the AMS117 which converts 5v into 3.3V. 7€ on AliExpress.

    GW1N-UV9UG169C6/I5 FPGA - Its a...
    07-04-2025, 12:23 PM
  • valvashon
    LG 55UH6150- trouble powering up, then half lit screen (pictures!)
    by valvashon
    The 55" LG has been in the basement for a few months without being used. Turned it on yesterday, set came on as it should and showed a complete screen for about 5 seconds (was on a broadcast channel but no antenna was connected), then the screen went mostly dark with about 1/3 of the screen on the right lighting up with brighter lines in that lit part (sorry, no pictures of that). Power LED was cycling too, preventing the TV from fully powering up.
    Pulled the back off, all boards looked OK. Pulled the LED connector, turned the set on to see if it would power up but I don't belive it...
    11-24-2024, 12:08 PM
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