Ue49m5500 no picture but backlights

[sordids999]

Hi guys

Got this samsung today but no picture
on the screen but backlights are good

Tcon fuse has 12v

Pin 1 Nc 3.26v
Pin3 13v 12.7v
Pin5 13v 12.7v
Pin7 13v 12.7v
Pin9 13v 12.7v
Pin 11 and
Pin 2 of on/off 3.3v
Pin4 od/us 3.26v
Pin7 blu_pwm 3.26v
Pin8 ps_on 3.26v
Pin 10 gnd
Pin 12 gnd

Thanks

[sordids999]

Re: Ue49m5500 no picture but backlights

If I disconnect the left side tcon ribbon I have a white screen
If I disconnect the right side ribbon I have a blue screen

[CapLeaker]

Re: Ue49m5500 no picture but backlights

You shouldn’t see a blue screen. You can check the LVDS pairs with an oscilloscope, while flicking the menu on and off with the remote. Kinda crude way of testing if the main board works. Other than that, jam a new tcon in, they are usually cheap enough.

[sordids999]

Re: Ue49m5500 no picture but backlights

I spoke to the guy his wife used window lean spray to clean the screen then the tv just went off but still with sound and a glow on the screen
Would this damage the tcon ?
I'm thinking more cof strips but cant see any damage

[sordids999]

Re: Ue49m5500 no picture but backlights

Both lvds ribbons connected no voltages on the following pins in the picture
With the left ribbon disconnected voltages are good of the tcon

[diif]

Re: Ue49m5500 no picture but backlights

Both lvds ribbons connected no voltages on the following pins in the picture
With the left ribbon disconnected voltages are good of the tcon

If you can't see any liquid damage where the film meets the screen then you might get lucky and find it's a shorted capacitor.