LG 79UB9800 heat problem

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • petehall347
    Badcaps Legend
    • Jan 2015
    • 4439
    • United Kingdom
    #21
    Re: LG 79UB9800 heat problem

    your electricity supply needs checking . i think live potential is on the ground wire ..had this happen here a while back .
    might not be that but best check it ..
    ignore all that if tv doesn't have an earth connection .

      Comment

      • Davi.p
        Hobbist Tech
        • Sep 2009
        • 4456
        • Italy - Milan
        #22
        Re: LG 79UB9800 heat problem

        But how a tv can store elec. charge on the chassis without any connection? To Sushi: is there any Radio / TV station / cellular antenna in your area?
        Last edited by Davi.p; 10-21-2017, 02:00 AM.

          Comment

          • sushi1
            Member
            • Aug 2017
            • 32
            • Egypt
            #23
            Re: LG 79UB9800 heat problem

            there’s a cellular antenna nearby, but I think the TV just needs better grounding, since there are no grounding plans in the building’s electricity layout.
            Last edited by sushi1; 10-21-2017, 05:35 AM.

              Comment

              • RJARRRPCGP
                Badcaps Legend
                • Jul 2004
                • 6304
                • USA
                #24
                Re: LG 79UB9800 heat problem

                If Egypt has 440V service, (2 220V legs) then it will mean that a 220V line requires a neutral to avoid imbalance, which can cause a surge to come to the Tv,when on a leg that's not under heavy load, while the other leg is under heavy load by an appliance that's using a lot more watts than the Tv...

                (Such as the Tv on one leg, and a range or an air conditioner on the other leg!)
                Last edited by RJARRRPCGP; 10-22-2017, 09:19 PM.
                ASRock B550 PG Velocita

                Ryzen 9 "Vermeer" 5900X

                32 GB G.Skill RipJaws V F4-3200C16D-32GVR

                Arc A770 16 GB

                eVGA Supernova G3 750W

                Western Digital Black SN850 1TB NVMe SSD

                Alienware AW3423DWF OLED




                "¡Me encanta "Me Encanta o Enlistarlo con Hilary Farr!" -Mí mismo

                "There's nothing more unattractive than a chick smoking a cigarette" -Topcat

                "Today's lesson in pissivity comes in the form of a ziplock baggie full of GPU extension brackets & hardware that for the last ~3 years have been on my bench, always in my way, getting moved around constantly....and yesterday I found myself in need of them....and the bastards are now nowhere to be found! Motherfracker!!" -Topcat

                "did I see a chair fly? I think I did! Time for popcorn!" -ratdude747

                  Comment

                  Previous 1 2 template Next

                  Related Topics

                  Collapse
                  • Rofix
                    Problem HP Main Board DAG3DCMBCC0 REV C
                    by Rofix
                    Hello everyone I wanted to kindly ask you for advice I have a problem with this HP Main Board DAG3DCMBCC0 REV C motherboard, the PC does not turn on, the power connector works, 19V arrives, on the first three mosfets there are 19V, the main voltages such as 3.3V and 5V are on the various coils, on the power button 3.3V arrives, I checked the power button and it works, but the PC does not turn on, moreover when I connect the power supply to charge the battery it does not charge, no LED lights up at the moment as the voltage is at 14.7V, the nominal voltage written on the battery is 15.4V, I also...
                    12-19-2024, 02:10 PM
                  • marcinq
                    Samsung UE60KS7000 No Standby Light
                    by marcinq
                    Hello,

                    I've got a problem with a Samsung UE60KS7000 that was given to me and said that there was a problem with the One Connect box but as I understand the TV should turn on even with the One Connect box disconnected (which it doesn't). There is no stand by light.

                    I've disconnected the Main Board from the PSU and when connecting to mains the backlight turns on which suggests the PSU might be ok. I've measured the voltages out of the PSU and they seem reasonable (like the labels say). The main board has no obvious burns, there are no shorts on the power rails anywhere....
                    4 Photos
                    05-26-2025, 11:36 AM
                  • cheeky2
                    Is it possible to upgrade from a Vestel 17MB97 main board to a 17MB110 Main board?
                    by cheeky2
                    I suppose the real question is whether the existing pinouts from ether a 17IPS71 psu are cross compatible with a 17IPS12 psu? If they are then the exchange of the main boards should have no issues providing the screen is compatible with both main boards. Obviously you can change the screen configurations easily enough (providing you have the correct files) for the main board. Why may you ask would I do this? Well a lot of the smart features are no longer working on a Hitachi 48HBT62U main board I wish to give it a new lease of life!
                    Obviously the same LVDS connector for the screen connection...
                    05-25-2024, 03:27 AM
                  • bcstedt
                    Samsung PN50C540G3FXZA 50" Plasma, power cycling, Y-Main problem, Canada
                    by bcstedt
                    Just starting to crack into this one and wanted to get the ball rolling.

                    At power on (plug in), power light on, relays click, repeat (sometimes)

                    After disconnecting Y-Main from SMPS power stays on and boot up jingle is heard from speakers

                    Removed Y-Main for inspection and testing

                    This pic from:
                    PN50C540G3FXZA Fast Track Troubleshooting Manual - Rev 1/10/12
                    ...
                    12-15-2023, 10:30 AM
                  • Dani_2024
                    Sceptre U550CV-UMR 4K LED, Bad Caps on Main Power Board?
                    by Dani_2024
                    Hi and thanks in advance for any input you might provide!
                    I have a Sceptre U550CV-UMRD8POTV83BB 4K LED (this is a dumb tv) that I bought new in August 2021, so It's just completed 3 years.
                    Main power board model: TP.MS3683.PC821 T-Con board: N4TP546UHDPU2L_BO

                    Last Sunday I was watching a dvd and fell asleep for about half hour, when I awoke the tv screen was black and couldn't get the dvd menu to show, so I changed the input to antenna and had sound but no picture, turned it off. I then got online and found this great site! ....read many troubleshooting tips and this...
                    5 Photos
                    10-28-2024, 05:06 PM
                  • Loading...
                  • No more items.
                  Working...