47le5300

[sordids999]

wont turn on no backlight theres a power on touch screen sensor on the front can get that to work but thats about it

thanks

[tom66]

Re: 47le5300

Start by checking BL ON/OFF from main board.

[sordids999]

Re: 47le5300

sorry tom which one is the BL ON/OFF ive attached some pictures
also tom if i press the button in the picture the backlight comes on

[newtothis]

Re: 47le5300

Try this, Make sure there is an input in the TV... bet you the backlights do not turn off.

If you have nothing plugged in the set will turn the backlights off after a few seconds

[newtothis]

Re: 47le5300

Had same issues, if you shine a light into the screen once you turn it on and the backlights go off you should be able to see the no input signal icon... press menu on remote.. goto settings and factory reset. i have a feeling it will not turn the backlights off then either.

[sordids999]

Re: 47le5300

no just tried this connected avi lead into main board nothing so pressed the button on main board the backlight lit up but went straight off
could not see no input signal icon on the screen

[newtothis]

Re: 47le5300

So just to confirm you cannot see any image at all with a flashlight?

[sordids999]

Re: 47le5300

no m8

[newtothis]

Re: 47le5300

So no back lights and no image.

The LED driver board is built into the PSU on these models.

Which button have you pressed in post #3?

@ Tom, There are no references on the boards to indicate what pin is for what... This board is slightly different to the one I was working on the other day but same will apply.

[sordids999]

Re: 47le5300

heres the picture m8
SW1001 is the button i press to light the backlight up it only stays on for as long as you hold the button in
tried last night with light shining on screen no image showing

thanks

[sordids999]

Re: 47le5300

just want to bump this up decided to get back to this tv after so long but basically suspect main board failure tv totally dead so does anyone have a idea how i can jump the power supply to see if its the main board,looked in a service manual but not much info

thanks

[sordids999]

Re: 47le5300

on the legend on the PSU i have

20V POWER ON
20V 20V
GND GND
GND GND
3.5V 3.5V
3.5V 3.5V
GND GND
V-SYNC GND
DRV ON 12 V
SCLK 12V
PWM DIM 12 V
ERROR OUT SIN