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**damboo** · 02-06-2020, 07:31 AM

Re: Lg tv - 47lb6530-td

Originally posted by damboo View Post

HI!

I would like to ask for help. I do have 47" LG TV. suddenly while watching the screen goes off and when I turn it on again the RED LIGHT blinks three times and will become steady without the screen on. I suspect the PSU got damage. I pull out the PSU and checked the supply pin going to the mainboard and getting all the specified voltages like 3.5v, 12V, power on, PPDIM2 and PDIM1 except I'm not able to get the 24v. Does it mean the PSU is fine or maybe the mainboard is the one damage?

PLS HELP!
THANKS!!!!!

I attached the PSU diagram

Attached Files

lgp474950_14pl2_eax65423801_2.0_rev1.0(1).pdf (1.53 MB, 10 views)

**budm** · 02-06-2020, 04:39 PM

Re: Lg tv - 47lb6530-td

Can we see good clear straight shot of the whole top and bottom side of the power supply boars?

**damboo** · 02-07-2020, 05:12 AM

Re: Lg tv - 47lb6530-td

I really don't know what just happen. but I'm getting now the voltages 3.5v,12v, and 24v but no backlight. but no voltage reading at DRV-ON, P-DIM1 and P-DIM2. as I understand to the BASIC LCD TROUBLE SHOOTING you had shared to me (thank you for that). 12v and 24v would not turn on without pressing the power button switch. but on my case, once the tv plug in to 220v the red power indicator immediately blinks 2 or 3 times and become steady without pressing the power on button. and at the same the other voltages are on except for those DRV-ON, P-DIM 1and 2. I begin to doubt the mainboard is defective.
I uploaded the PSU images.

Attached Files