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Proserot
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Last Activity: 02-23-2023, 11:13 AM
Joined: 03-02-2022
Location: Mörlenbach
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  • Proserot
    replied to Lg oled65b9dla
    in Troubleshooting TVs and Video Sources
    Re: Lg oled65b9dla



    I wasnt actively trying to produce this, i was just trying to find the impulse origin. Didnt really expect it to randomly not shut off



    I'm not sure what kind of pictures youre asking for right now. Pictures of the boards are in a comment further up the conversation (imgur)...
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  • Proserot
    replied to Lg oled65b9dla
    in Troubleshooting TVs and Video Sources
    Re: Lg oled65b9dla



    Thx!

    Now when i was playing a bit i clipped in the LVDS while the optical port was red (MB running, connected to laptop via HDMI 1).

    The TV didnt go to STDBY immediately this time. While i still got no sound, it usually just turns off on the spot when i did this in the past.

    I couldnt check if i got any picture as its lying face down on the floor rn...

    Is there a way to get it to display Test pictures? The Red green blue white things you do for driver board test?...
    See more | Go to post

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  • Proserot
    replied to Lg oled65b9dla
    in Troubleshooting TVs and Video Sources
    Re: Lg oled65b9dla



    Yeah, they both 21.8v...
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  • Proserot
    replied to Lg oled65b9dla
    in Troubleshooting TVs and Video Sources
    Re: Lg oled65b9dla

    Oh and: The TV really has not a lot of hours on its back. Maybe 1 to 2 Hrs per day, gaming after work, if I'm not on PC Monitor.

    Sometimes a whole week not one Minute of operating time...
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  • Proserot
    replied to Lg oled65b9dla
    in Troubleshooting TVs and Video Sources
    Re: Lg oled65b9dla



    The optical won't come on when 22v disconnected from TCon. Will only come on if I unplug the 51pin LVDS.

    I've read about some jumpers on the MB connector on Power board side, is this something which is applicable here? Anyways, what'd be the goal to achieve? Have the expected voltages on the pins to proceeded boot up procedure?

    And many thanks for your explanations. I've read many posts from your, old ones too and you're like a TV god ...
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  • Proserot
    replied to Lg oled65b9dla
    in Troubleshooting TVs and Video Sources
    Re: Lg oled65b9dla

    Damn

    Would I be able to measure that signal? Sounds like an easier way to know about a short than pulling cables ;D

    And is it like one row, one cell or all cells shorted?

    How can this occur? The TV was wall mounted for 2 yrs then just turned off while gaming and voilà.

    Can I somehow test the power board and TCON for function so I can safely give them away?
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  • Proserot
    replied to Lg oled65b9dla
    in Troubleshooting TVs and Video Sources
    Re: Lg oled65b9dla



    Thanks! Could you elaborate how you can conclude this? Still new to the TV scene and at least want to learn something from all of this


    What's responsible for telling the MB to shut off because theres shorted cells?
    Any measurement point to "see" the short with a multimeter?...
    See more | Go to post

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  • Proserot
    replied to Lg oled65b9dla
    in Troubleshooting TVs and Video Sources
    Re: Lg oled65b9dla



    What i thought. Ive seen (on service manuals) that some MBs have LEDs but cant make out any on mine....
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  • Proserot
    replied to Lg oled65b9dla
    in Troubleshooting TVs and Video Sources
    Re: Lg oled65b9dla

    If I remove the 22v Socket from TCON no change. Only once did the SPDIF connector light up for a second. Couldn't replicate at will.

    With both 22v and 12v disconnected, its the same behavior.

    Only if I remove the LVDS cables from MB to TCON is when the SPDIF lights and stays on.

    I cannot see any other LEDs on the MB. Shall there be some?
    See more | Go to post

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  • Proserot
    replied to Lg oled65b9dla
    in Troubleshooting TVs and Video Sources
    Re: Lg oled65b9dla

    [HTML]https://imgur.com/a/ZTqivD3[/HTML]

    Ive done some blind testing as im pretty new to TV fixing.

    DRV_ON for example in 0V in OFF, jumps to 1.5v when pressing power button and returns to 0v. This might explain the absence of 22v for the Panel
    HTML Code:
    Re: Lg oled65b9dla

[HTML]https://imgur.com/a/ZTqivD3[/HTML]

Ive done some blind testing as im pretty new to TV fixing.

DRV_ON for example in 0V in OFF, jumps to 1.5v when pressing power button and returns to 0v. This might explain the absence of 22v
    See more | Go to post

    Leave a comment:

  • Proserot
    started a topic Lg oled65b9dla
    in Troubleshooting TVs and Video Sources

    Lg oled65b9dla

    Hi all,

    ive got an OLED65B9DLA here which isnt showing any picture. When turned on, the PSU delivers appropriate Power, as soon as 20V to T-CON is due, it ramps up to 20V then immediately stops, going back to 0V.

    When removing the ribbon cables from TCON to Mainboard, it doesnt do this.

    The red standby Led is on the whole time.

    Sound isnt working either when connected to a Laptop, it does show up as the correct device tho.

    I have a service remote but cannot actually make use of it as the TV wont turn on (i think?).
    ...
    See more | Go to post
  • Proserot
    started a topic Asus GL702VM Keyboard intermittently not working
    in Troubleshooting Laptops, Tablets, and Mobile Devices

    Asus GL702VM Keyboard intermittently not working

    Hi,

    so I have this one Asus GL702VM here where sometimes the Laptop has no signs of life after being turned off, hence no LED anywhere.

    The Laptop was at a repair shop before with the note that the MB was defective but the part isnt available anymore.

    Either way, if I remove the keyboard ribbon cable and short the pins, the laptop turns on, no problem. If i turn it off and put the KB cable back in i get no LED again.

    If i turn the laptop on, put it in hibernation, plug the keyboard back in it works fine. No problems at all.

    The aforementioned...
    See more | Go to post
    Last edited by Proserot; 03-14-2022, 11:20 AM.
  • Proserot
    replied to Medion Erazer not posting
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    Re: Medion Erazer not posting

    Had a similar thought. Or a hot air gun at 500c.
    Especially as the rubber from the CPU edges is missing. But idk if it was there to begin with. Just looked for a second opinion : D

    Well, the CPU isn't shorted out, yet I don't waste any more time. I got it for the screen, so I'll only take the screen.
    See more | Go to post

    Leave a comment:

  • Proserot
    started a topic Medion Erazer not posting
    in Troubleshooting Laptops, Tablets, and Mobile Devices

    Medion Erazer not posting

    Hi all,

    I have a medion erazer which has Fan spins and then turns off.

    Ive noticed some corrosion (even tho water never touched the laptop) and a weird spot on the cpu die and behind the Socket... is dead dead?

    [url]https://ibb.co/DRyr9p6[/url]
    [url]https://ibb.co/x8GWyJs[/url]https://Hi all,<br /> <br /> I have .../DRyr9p6[/url]
    See more | Go to post
    Last edited by Proserot; 03-06-2022, 08:16 AM. Reason: Forgot pics
  • Proserot
    replied to FX505DD REV 2 blowing MOSFETS
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    Re: FX505DD REV 2 blowing MOSFETS

    Oh. Thanks for this information!
    I cant help but think thats a stupid design but robably has its reasons. Just gotta know about it. Even tho I couldnt measure any voltage besides 20,5 and 3.3 on the coils
    See more | Go to post

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  • Proserot
    started a topic Where to source components from?
    in General Electronics Technical Discussion

    Where to source components from?

    Where can you buy components such a MOSFETS from notebooks?
    I found one seller but they have a ridicolous shipping fee (or big order)

    im more or less looking for a vishay ZF906 MOSFET but different ones for sure are to follow.
    See more | Go to post
  • Proserot
    replied to FX505DD REV 2 blowing MOSFETS
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    Re: FX505DD REV 2 blowing MOSFETS

    Im aware of this not being a very good Idea but do you mind elaborating?

    The power shouldnt come very far when turned off as only the 3.3 power rail should be powered, isnt it?
    See more | Go to post

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  • Proserot
    started a topic FX505DD REV 2 blowing MOSFETS
    in Troubleshooting Laptops, Tablets, and Mobile Devices

    FX505DD REV 2 blowing MOSFETS

    Hi all,

    first of all: Sorry, im kinda new to board repairs. Ive managed to do some repairs before, yet I consider them quite easy (obviously).

    A friend of mine had his tuf FX505 spilled with coke. It wasnt used anymore anyway so he gave it to me.

    Ive cleaned the board, removed 2 MOSFETS at the CPU PSUs causing shorts all over the board. After I couldnt identify any more shorts, I felt confident in plugging the charger and see how far the juice comes. For a second i couldve sworn I saw smoke...

    Then i saw the MOSFET at the Battery connector...
    See more | Go to post
  • Proserot
    replied to New Members - please post your introductions here
    in Announcements & Related News
    Re: New Members - please post your introductions here

    Hi guys,

    im pretty new to this stuff and am still learning. I do so as I usually do, learning by doing.

    I found pleasure in this as a hobby when I felt the satisfaction after I revived my moms phone (simply replacing a charging port and a an obviously blown cap). So i seeked for more.. you know that.
    See more | Go to post

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