"2 seconds to black" issue, capacitors are fine

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  • wizard13
    Dynabook Satellite Pro C50D-B-100 - BIOS Issue, Black Screen
    by wizard13
    Hello everyone,

    I am experiencing a BIOS-related issue with my Dynabook Satellite Pro C50D-B-100. When I power on the laptop, the screen stays black, and there is no response from the system. I suspect a corrupted BIOS.

    I have checked the forum and the available documentation but could not find a solution specific to my issue.
    • Brand & Model: Dynabook Satellite Pro C50D-B-100
    • Part Number (P/N): PYU13E-00C00PFR
    • Serial Number (S/N): 22028896H
    • System Configuration (SC): A1PYU13E1127
    • Motherboard Model: IP3_ACN16_MB_V21_20211222A
    • Power Input: DC 19V –
    ...
    02-28-2025, 02:43 AM
  • 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
  • Ancient1
    Strange LG TV issue : Image vertical lines in black screen
    by Ancient1
    Hi

    Asking for a friend.

    I'm used to black vertical line in otherwise good image - probable solution is a rubber to push and tighten the COFs bonding.
    but here its the opposite !

    TV has new T-con = same issue
    A missing panel voltage would have global effect

    So , what should one do ? how can I find where the fault is ?

    Thanks !...
    02-05-2025, 03:37 PM
  • Noodneek
    Replacing all the caps on the BenQ SW2700pt's power board didn't help...
    by Noodneek
    My 3.5 years old monitor (BenQ SW2700pt) started to black out for 1-2 sec every minute or so, it was doing this even with PC disconnected from it. I searched online and read that it's probably aging capacitors and there's a workaround to lower the brightness.

    I lowered it from 100 to 65% and it indeed helped, but after a couple of months the issue returned... I continued to lower the brightness, but it helped only for a couple of hours at most, then I needed to lower it further... Turning the monitor off and waiting for it to cool down also helped for a short time, after which it...
    08-30-2024, 12:52 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
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