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  • 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
  • vbogoev
    Lenovo S6000 won't turn on. Data recovery needed.
    by vbogoev
    Hello,

    Here I have the mentioned tablet with motherboard s6000-mb-h401. The tablet won't turn on, no display, charging normally. I manage to connect to UART port and got this output when I try to start it:

    Code:
    [PWRAP] pwrap_init_preloader
    [PWRAP] pwrap_init
    [PWRAP] _pwrap_init_sidly [Read Test] pass,SIDLY=0 rdata=5AA5
    [PWRAP] _pwrap_init_sidly [Read Test] pass,SIDLY=1 rdata=5AA5
    [PWRAP] _pwrap_init_sidly [Read Test] pass,SIDLY=2 rdata=5AA5
    [PWRAP] _pwrap_init_sidly [Read Test] pass,SIDLY=3 rdata=5AA5
    [PMIC_WRAP]wrap_init pass,the return
    ...
    06-20-2023, 06:36 AM
  • Tr0ll
    T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus8545)
    by Tr0ll
    Hi guys! I realized you have a lot of knowledge here so i am hoping you could point me in right direction with my odd issue.

    The Tv is a Philips 58PUS8545/12, it had no picture but working backlights.

    Original T-con:
    Opened the Tv and tested to unplug one ribbon cable at a time. With this test i could see that i got fine picture on both halves as long as there was only one ribbon cable connected, with two connected picture were gone.

    First replacement T-con:

    I thought it might be t-con and ordered new t-con from china(supposedly tested)...
    10-07-2023, 07:48 PM
  • JJAAMM
    SAMSUNG UN55KS9000F picture fades then distorts into vertical lines after 20 seconds
    by JJAAMM
    This was my main TV for the last 6 years. I'm not inclined to throw out a $2600 TV so quickly so I'm trying to investigate the issue.

    Problem
    TV was disconnected from power for 6 months during construction. When I plugged it yesterday picture was fine, after 30 seconds it dimmed then started developing horizontal lines, picture then starts to ghost vertically until it degrades into vertical streaks. TV always displays a perfect picture when cold. I can unplug TV for 5 minutes and plug it back in and picture is restored for 20 seconds. I can also keep it in standby mode...
    07-06-2023, 06:01 AM
  • flibidy
    Magnum IA.100 Amplifier Switches on, No Output, Possible Input Side fault?
    by flibidy
    I have here a Magnum IA.100 which belongs to my parents.



    The unit powers on & when the relay kicks in, you get a pop from the speakers (this might sound weird but is usual behavior for this amp). However, you get nothing coming through it from any of the inputs & no pops and crackls from any of the controls.


    Because of the sound from the speaker when the amp turns on I have assumed that the output section probably works but I could be wrong & I'm not sure how to test that side of things further.


    What Ive done........
    01-01-2025, 01:26 PM
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