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Panasonic TX-32LX60P GLP21 Chassis TV: Standby Light Blinks Every 12 Seconds - No Functioning Signs

Michaś 124 4138 18
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Why does a Panasonic TX-32LX60P (GLP21 chassis) blink the standby LED every 12 seconds and not power up?

The TV is likely shutting its power supply down from the main board, so you should isolate the boards and test the PSU separately. First disconnect the LVDS cable from the screen/controller board and recheck whether the power-supply voltages stay present; if not, disconnect the main board and force the PSU on by bridging the two pins and feeding BL ON, then measure all outputs [#8229015] If the voltages become normal only when the main board is disconnected, the fault is probably on the main board, possibly the MCU, and may not be easy to repair unless the bad part can be replaced [#8229015]
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  • #1 8226241
    Michaś 124
    Level 11  
    Posts: 14
    Rate: 4
    Hi there is such a Panasonic TX-32LX60P GLP21 Chassis TV. Symptoms after switching on the network will light up after 12s blinks and goes off every 12s, no more signs of functioning. Maybe someone had a similar case.
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  • #2 8226378
    radsat
    Moderator  
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    What about the tensions?
  • #3 8226408
    Michaś 124
    Level 11  
    Posts: 14
    Rate: 4
    It looks like they are all
    I will download the diagram and compare it
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  • #4 8226416
    zbyszekskibinski
    Level 33  
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    Buddy first see if you have the correct stby (5V) and whether the capacitors have 'puffed' on this line.
  • #5 8228248
    Michaś 124
    Level 11  
    Posts: 14
    Rate: 4
    I am again
    I checked the voltage from the 12V power supply is stable, 24V will start for a moment and turn off, 5V what I write my friend I will check
  • #6 8228295
    zbyszekskibinski
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    If you have other voltages, you definitely have a standby as well. Unplug the inverters and see if you still have a 24V rigid voltage.
  • #7 8228298
    radsat
    Moderator  
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    Check the voltage on SIG24V, AUD24V, RELAY24V.
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  • #8 8228338
    Michaś 124
    Level 11  
    Posts: 14
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    After disconnecting the inverters, nothing changes 24V is for a moment and turns off, the relay switching on the inverters also does not control

    Added after 1 [minutes]: < br />

     SIG24V, AUD24V, RELAY24V. identically the same for a fraction of a second is and falls to 6V and after 12sec. he tries to start again
  • #9 8228391
    zbyszekskibinski
    Level 33  
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    So the motherboard disconnects your power supply and you should look for faults on it. To confirm this, just give a voltage of 3-5V on this power supply pin where you have ON / OFF and all the voltages you should get
  • #10 8228444
    Michaś 124
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    I think my friend Zbyszek is right, but where to start on the motherboard? :idea:
  • #11 8228511
    zbyszekskibinski
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    There often such a disconnection causes EEPROM (a 4-pin scalpel, I do not know how in your model, you should have 24+ letters on them) or Flash. Ultimately, the repair will be difficult the first time, at the beginning it is best to change the disc, and if you gain 'perfection' you can exchange individual scatter and memory. Check the elki at the beginning also.
  • #12 8228517
    radsat
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    Zbyszku motherboard yes or not power supply, but equally damage can be on the power supply, control of outgoing voltages, then it will be the same situation. In short, look ahead, measure and think.
  • #13 8228524
    Michaś 124
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    EEPROM is 24c32 can put in a blank - you must be the original upload
  • #15 8228536
    zbyszekskibinski
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    Yes, it can also be a power supply ... but to check it a colleague would have to charge something (for example, 24V bulbs) and measure tetnia. In principle, if all the voltages will be out. this theoretically should be ok. Koledze Michas, I still want to see if the BL ON / OFF voltage is stable after the start.
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  • #16 8228540
    Michaś 124
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    Or maybe col.radstar is right - maybe try to fire from external 12V, 24V power supplies and see what will happen
  • #17 8228541
    zbyszekskibinski
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    Ah, I'm sorry for a 4-pin on one side I was supposed to say ...
  • #18 8228559
    Michaś 124
    Level 11  
    Posts: 14
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    Thanks for the eeproma I will try

    Added after 39 [minutes]: < br />

     The eeprom replacement did not help - my mother thank you all for today - I will fight again tomorrow
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    #19 8229015
    zbyszekskibinski
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    I recommend, therefore, to do so:
    1) Disconnect the LVDS cable from this board at the screen (Time-control) and re-check whether the voltage from the power supply is present.
    2) If this does not help, disconnect the motherboard and check the power supply by forcing it to work with two pins connected in series and connected to the BL ON power supply and measure all output voltages.
    3) as the voltage will change the main board, you probably will not be able to repair it, because it could be MCU, unless you can change the part.
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Topic summary

✨ The Panasonic TX-32LX60P GLP21 Chassis TV exhibits a malfunction where the standby light blinks every 12 seconds without any further signs of operation. Users suggest checking the power supply voltages, particularly the standby (5V), and inspecting capacitors for damage. It is recommended to disconnect inverters and measure voltages on SIG24V, AUD24V, and RELAY24V, as fluctuations may indicate motherboard issues. The EEPROM may also be a potential fault, with suggestions to replace it if necessary. If the problem persists, further investigation into the motherboard and power supply is advised, including forcing the power supply to operate and measuring output voltages.
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