I picked up this 55" element eldft551 where the symptoms are that you can turn it on and the power light goes blue, but other then that nothing happens.
There were some hidden screws under the "label" that marks the ports (I think they changed the port layout after the plastics were produced), the previous owner had destroyed the back plastics cause he didn't realize there were screws there when he took it apart to try to fix it.
I tested the power supply and there aren't your usuall "logical" markings so im not sure what pins it uses to know when to turn on. I did notice though that 5vsb is always 5volts and always there. Also when you first plug it in the 12v and 5v both come on, the 12v is a bit low (11.82 volts, this power supply has a bunch of crap capacitors from JH "" but unless there is a voltage monitoring ability that shouldn't be causing it to turn off the voltages) and after you press the power button the 12v and 5v voltages come on for around 1-2 seconds and then turn off , but the tv stay "on" with the blue led lit, and can not be turned off without unplugging. There is also a "stb" wire that goes to 4v when the set is on.
The connector that runs to the main board (im quite certain its the only one that could be turning on the power supply unless morons are routing it through the inverter these days) is marked as
GND
GND
5V
5V
STB < Stays at 4v when the led is on
5VSB <always is 5v
5V
5V <comes on for a few seconds when plugged in and after pressing power button
GND
GND
GND
12V <comes on for a few seconds when plugged in and after pressing power button
12V
I tried jumping the 5vsb to "stb" with a 220 ohm resistor but that didn't make the power supply turn on (because I didn't see the blue light come on) , but perhaps that isn't the right logic so to speak and ill go see if the 12v and 5v come on for a second when I have the jumper in place.
Sorry for horrible pictures, I haven't figured out the best settings to use on my new cell phone for indoor shots.
Im gonna go look at elektrotanya for a service manual.
There were some hidden screws under the "label" that marks the ports (I think they changed the port layout after the plastics were produced), the previous owner had destroyed the back plastics cause he didn't realize there were screws there when he took it apart to try to fix it.
I tested the power supply and there aren't your usuall "logical" markings so im not sure what pins it uses to know when to turn on. I did notice though that 5vsb is always 5volts and always there. Also when you first plug it in the 12v and 5v both come on, the 12v is a bit low (11.82 volts, this power supply has a bunch of crap capacitors from JH "" but unless there is a voltage monitoring ability that shouldn't be causing it to turn off the voltages) and after you press the power button the 12v and 5v voltages come on for around 1-2 seconds and then turn off , but the tv stay "on" with the blue led lit, and can not be turned off without unplugging. There is also a "stb" wire that goes to 4v when the set is on.
The connector that runs to the main board (im quite certain its the only one that could be turning on the power supply unless morons are routing it through the inverter these days) is marked as
GND
GND
5V
5V
STB < Stays at 4v when the led is on
5VSB <always is 5v
5V
5V <comes on for a few seconds when plugged in and after pressing power button
GND
GND
GND
12V <comes on for a few seconds when plugged in and after pressing power button
12V
I tried jumping the 5vsb to "stb" with a 220 ohm resistor but that didn't make the power supply turn on (because I didn't see the blue light come on) , but perhaps that isn't the right logic so to speak and ill go see if the 12v and 5v come on for a second when I have the jumper in place.
Sorry for horrible pictures, I haven't figured out the best settings to use on my new cell phone for indoor shots.
Im gonna go look at elektrotanya for a service manual.
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