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LCD TVs - LED
LG 42LE5500-AM - Does not turn on
7.142
hace 5 años
hace 5 años
When this TV is turned on, the ignition touch switches on the keypad panel and logo (LED). Not so neither screen nor sound and after three or four seconds the keypad panel with logo is turned off. The source has all the voltages.
If anyone has any clue and / or experience in this fault I ask you to guide me in this regard. Thank you
6.594
hace 5 años
hace 5 años
Start with the reset system, you can check this in the service manual, here a link ... greetings
https://yoreparo.com/tv/televisores/lcd/led/preguntas/1566220/lg-42le5500-solo-enciende-tablero-frontal
hace 5 años
hace 5 años
I performed, on the same model and same fault, reflow and then reballing and continue with the same problem. Swap the mic with the one on another board just working ok and the fault persists on the same board as the beginning !! The one that worked continued to work ok, that is, it is neither micro, nor welding. There is another problem, there is no data traffic between the NVM (IC102) or the nand (IC101) with the micro. It is with oscillator and the reset works ok. It has all the tensions ok, I have 5 plates with the same problem, I have been denying the problem for days, and I already checked everything, I did not exchange more things at the moment, but I do not want to handle the plate ok much. Did anyone have any similar experience? Slds
hace 5 años
Hi Gilar, I don't know if you interpret what you tell me. The plates are identical, the traffic on the plate that works ok, after reset it begins to work, both in the NVM and in the NAND, there are several pulse trains (data), a few minutes ago I exchanged the 3 memories together between plates ( IC8100) Stan's micro memo, plus the other 2 mentioned (NVM and NAND) and everything remained the same! The one that worked continued to work, the one that didn't, still didn't work! I also measured the clock frequency by the doubts and it's ok, eh 54MHz. I keep checking tomorrow, if anyone has any more data ...
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