DP42849 Wont stay powered on.

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  • Hannibal_Hector
    Samsung UN39EH5003FXZA won't stay powered off
    by Hannibal_Hector
    Hello,

    Purchased a broken Samsung UN39EH5003FXZA (Version CD01) to have fun fixing. When I first acquired it, I did not connect any video signals and only plugged it into the wall. The unit booted and showed the “no signal” window and I could navigate all menus and change sources. I unplugged it, connected my over-the-air antenna to the coax, powered it on, got the unit to scan the HDTV channels, and I think then the TV self-shutdown with the melody. When I powered back up (melody), it would show the channel selected on the OSD and after a couple of seconds, it self-shutdown...
    03-02-2021, 07:57 PM
  • dicky96
    Dynacord PowerMate 600 Powered Mixer - Protect Light On
    by dicky96
    Hi guys
    I'm trying to repair this powered mixer. Sorry this is a bit long but I want to give as much info as possible to help get an answer,


    As soon as it powers on the protect light comes on. There are relays that connect the speakers to each channel of the amplifier but they never click. If I connect a 60W light bulb in series with the mains supply it comes in bright then goes to maybe 30-50% brightness - it seems to dim a little further over time

    I have power to the amplifier, I think it was as about plus/minus 50-60V for the main amp, and plus/minus 15V...
    05-22-2022, 04:36 AM
  • Sinnyone
    Yamaha RX-V3900 dim display and turns off
    by Sinnyone
    Hi all,
    This is a repost since I never completed this fix. I just left it, but now the receiver powers off into safe mode and does not complete the Self-Diagnostic when i start with those buttons pushed. It says it is, but does not do the diagnostics and does not show any faults or that it has none, which it should do. So here i am again. The previous post did have a schematic but I think it was cut off somewhere. I do not know what board it is referring to. Any help would be appreciated.

    I have searched through the forums and have not found anything about my problem. So,...
    08-30-2023, 08:35 AM
  • timtrace
    Won't stay powered on - Sharp LC52LE700UN with RDENCA336WJQZ DPS-286AP power supply
    by timtrace
    Greetings - first post. I'm awed that a forum like this exists. It's a dream come true. I'm not even kidding.

    I've got a 13 year-old Sharp LC52LE700UN television that's developed a problem of powering itself off after 30-45 seconds. If I pull the mains cord and reconnect, it will come back on right away without so much as a button push...then turn off after 30-45 seconds.

    Service manual S37X3LC46E77U is attached to this post, as well as a front and a back picture of the RDENCA336WJQZ DPS-286AP power supply taken after completing my work.

    Each time that the...
    05-14-2020, 09:24 PM
  • valvashon
    Repair Success! Middle Atlantic UPS2200R-IP
    by valvashon
    Yesterday I successfully repaired a Middle Atlantic UPS2200R-IP that had inadvertently been used as a surge suppressor at our transmitter site. It has already been replaced with an updated one but it's coming home with me now instead of being e-cycled. To be specific, this is the MA model that has the blue backlit display and has been discontinued, although this design may have been used in many UPS units including the smaller Middle Atlantic ones in this series.



    Here's what happened: We experienced a brownout/surge at the site, which damaged the UPS and took our broadcasting...
    02-06-2024, 12:54 PM
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