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Trouble shooting my tv not turning on.
When switched on the red light would blink and then go back to solid.
ANSWERS:
"@grayghosts
If it turned off pretty much immediately it could be a power board issue. The green light may have been your backlight. You did not tell us if you have any sound or anything else when the TV turns on. Check around connector P202 on the power board and measure the output on the board connector according to the silkscreened values. You do want to go ahead and remove the back and post plenty of good images of your boards and your layout/wiring with your question. That way we can see what you see. Use this guide Adding images to an existing question for that. We do need to know your exact model. That power board you are having was used for different models commonly in the 55LW5600
Update (08/21/2018)
@grayghosts
Since we still do not know what model this is all I can provide at this time are teh voltages you need to get on your powr board. You’ll need a multimeter and to put your TV back together. Then measure the voltages.
The fuse F101 reads approximately 57V and F501 reads 154V during this time (from hot ground) . The transformer T501 delivers an AC signal which is rectified and filtered by D201, D202, C201 and C202 which develops a Stand-By voltage of 3.55V which is used by the SMPS Controller circuit and is also sent to the Main Board. It is output P201 pins 9~12 and sent to the P502 on the Main Board.
When the controller chip on the back side of the SMPS receives the PWR-ON command 3.4V via P201 Pin 1, it turns on the Relay RL101 which supplies AC to the bridge rectifier BD101. The primary section (Power Factor Controller circuit) increases its current supplying ability.
Both Primary fuses F101 and F501 now reads between 395V~397V (from hot ground). D253 receiving switching pulses from L601 and filtered by C256 and C257, develops the 63V for the LED backlights.
When the SMPS (switch mode power supply)receives the DRV_ON command from the Main board via P201 Pin 18 (3.24V) it turns on the on-board Inverter to start driving the LED backlights. The backlight brightness is controlled by the Main board via PWM Pin 22 and Local Dimming signals via P832. :-)
P201 Connector: (To Main Board)
3.5V_ST (3.55V) output P201 pins 9~12
12V output P201 pins 17, 19 and 21
24V output P201 pins 2, 3 and 4.
Turn on commands
P202 Connector: ( To Panel LEDs)
63V output P202 pins 1 and 12.
P203 Connector: (To Panel LEDs)
63V output P203 pins 1 and 13.
Let us know what you find
Update (08/26/2018)
okay start with these test. Read what I previosult answered so you know that the backlight voltage etc. comes up when you start the TV. Keep your hands safely away from any bare metal :-)"
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