TV Powers on, then Off - Emerson LF501EM5F

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  • Shyguy707
    Newbie
    • Mar 2021
    • 4
    • United States
    #1

    TV Powers on, then Off - Emerson LF501EM5F

    First off, yes I have seen the sticky for general troubleshooting as well as previous guides on this exact model, I actually followed one of them to get me to this point as my PSU was doing the chirping sound due to a malfunctioning C3214 capacitor.

    Now my T.V. actually turns on. As soon as I plug in the power cable into AC power (without touching power switch on T.V.), the screen will illuminate for a few seconds, then shut off. I press the power switch and the T.V. will do the same thing, refusing to stay on.

    I'm getting closer, but I need more help to get there, I would love to get this curbisde find up and running for my workshop!
    Tags: None
    • nomoresonys
      Badcaps Legend
      • Jan 2013
      • 12206
      • U.S.
      #2
      Re: TV Powers on, then Off - Emerson LF501EM5F

      Test the voltages at the connector on the powerboard with EVERYTHING hooked up, it's the connector that the cable from powerboard to mainboard hooks into, most times there's a legend/map nearby that gives the expected voltages, you measure them with your mutimeter, set meter to 20 vdc then report them, put neg probe on chassis metal ground, pos probe on pin of connector, measure in standby take note, leave probes where they are then power on tv and again take note of voltages, report them here, example pin 1-ps-on-0 volts standby-power on-3.3 volts.
      Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

        Comment

        • nomoresonys
          Badcaps Legend
          • Jan 2013
          • 12206
          • U.S.
          #3
          Re: TV Powers on, then Off - Emerson LF501EM5F

          Can you post some focused straight on pictures of each board and one of the whole back, as to see how everything is connected?
          Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

            Comment

            • nomoresonys
              Badcaps Legend
              • Jan 2013
              • 12206
              • U.S.
              #4
              Re: TV Powers on, then Off - Emerson LF501EM5F

              Could be one or more additional bad caps.
              Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                Comment

                • nomoresonys
                  Badcaps Legend
                  • Jan 2013
                  • 12206
                  • U.S.
                  #5
                  Re: TV Powers on, then Off - Emerson LF501EM5F

                  Is your version DS1? can tell by looking on back cover, should be close to the model number.
                  Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                    Comment

                    • Shyguy707
                      Newbie
                      • Mar 2021
                      • 4
                      • United States
                      #6
                      Re: TV Powers on, then Off - Emerson LF501EM5F

                      See photos, according to serial number prefix, it may be a DS1.

                      Here are the readings I've got, sorry if the layout is poor:
                      Stand By Readings
                      P1: 14.31V
                      P2: 14.31V
                      P3: 14.31V
                      P4: 14.31V
                      P5: 7.93V
                      P6: 7.93V
                      P7: 7.93V
                      P8: 7.93V
                      P9: 0mV
                      P10: 0mV
                      P11: 0mV
                      P12: 0mV
                      P13: 0mV
                      P14: 3.315V
                      P15: 0mV
                      P16: 0mV
                      P17: 3.315V
                      P18: 0mV
                      P19: 0mV
                      P20: 0mV
                      P21: 3.315V
                      P22: 0mV
                      P23: 0mV

                      Power-On Readings

                      P1: 22.68V
                      P2: 22.68V
                      P3: 22.68V
                      P4: 22.68V
                      P5: 13.02V
                      P6: 13.02V
                      P7: 13.02V
                      P8: 13.02V
                      P9: 0mV
                      P10: 0mV
                      P11: 0mV
                      P12: 0mV
                      P13: 0mV
                      P14: 0mV
                      P15: 3.314V
                      P16: 3.05V
                      P17: 3.3V
                      P18: 3.0V
                      P19: 3.10V
                      P20: 3.2V
                      P21: 3.314V
                      P22: 424.8mV
                      P23: 0mV
                      Attached Files

                        Comment

                        • Shyguy707
                          Newbie
                          • Mar 2021
                          • 4
                          • United States
                          #7
                          Re: TV Powers on, then Off - Emerson LF501EM5F

                          By the way, forgot to say thanks for the help, bud!

                            Comment

                            • nomoresonys
                              Badcaps Legend
                              • Jan 2013
                              • 12206
                              • U.S.
                              #8
                              Re: TV Powers on, then Off - Emerson LF501EM5F

                              It's harder when the pins are not labeled, this board doesn't seem to have a label/legend, try heating with a hairdryer or cooling with freeze-spray or inverted can of air IC3006 on mainboard not powerboard, then plug tv in and see if it starts up or acts any differently.
                              Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                Comment

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