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LG 55LF 5800 no video,no sound or backlight

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    #21
    The USBs are now closer to 1 mom and the hdmi are 2.8 mom

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      #22
      Okay, warm up the processor.

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        #23
        NO... don't touch SoC... we have here similar with LF search the forum.... the Micom hat cut off and we did DIY... the owner of threat i remember from sweden... search the forum to learn.

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          #24
          Originally posted by Diah View Post
          NO... don't touch SoC... we have here similar with LF search the forum.... the Micom hat cut off and we did DIY... the owner of threat i remember from sweden... search the forum to learn.
          Not sure what you are saying.Can you send me the link of what you are talking about.Thanks

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            #25
            Originally posted by waybel View Post

            Not sure what you are saying.Can you send me the link of what you are talking about.Thanks
            Post clear closed resolution photo of yours MB... to point you..... if you search the forum you will find it i will not do this job for you..

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              #26
              thanks here is pic

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                #27
                yours photo not the best... tell the label of this 2 chips.. with red i think the converter we are looking for.

                Click image for larger version

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                  #28
                  With red, this is actually an audio frequency power amplifier.

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                    #29
                    Originally posted by lotas View Post
                    With red, this is actually an audio frequency power amplifier.
                    yes it could be... but we want to know what he have to say .. after he read and understand the label.

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                      #30
                      the yellow chip says 100GEA 527FZOA
                      the red chip says NTP7513 T5000266-1AF 15285
                      Attached Files

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                        #31
                        Red is audio amplifier.The yellow i believe is a 16-Bit Single-Chip Microcontroller

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                          #32
                          Renesas R5F100GEAFB

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                            #33
                            When turned on, is 12v supplied to the t-con?

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                              #34
                              Originally posted by lotas View Post
                              When turned on, is 12v supplied to the t-con?
                              yes

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                                #35
                                Micom controls all dc/dc converters and switches for powering cpu, ram,..., do these voltages also appear on the motherboard (1.2V, 1.8V, 2.5V, 3.3V, 5.0V)?

                                Service Manual...
                                Attached Files
                                Last edited by lotas; 01-11-2025, 06:07 PM.

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                                  #36
                                  Just looking quickly on various places on main board found 1.2 V 3.3V 3.5v 5v 12v and 24v

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                                    #37
                                    Originally posted by waybel View Post
                                    Just looking quickly on various places on main board found 1.2 V 3.3V 3.5v 5v 12v and 24v
                                    very things correct... did you have the Audio Optic port lit red?
                                    you need to remove the Bezel and inspect the glass display if any where on rand broken .. Panel VCC rail goinf over all the screen from rand.the thin film.

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                                      #38
                                      The audio optic is not lit red and the screen is fine,I had it all apart to change LED strips

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                                        #39
                                        Plug it with LAN to yours router... see if it pick up IP.. no IP mean SW didn't start at all

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                                          #40
                                          no nothing working

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