A1708 820-00840-A no image

[hgoncalves]

Hi,
I have an A1708 820-00840-A no image that has no image on internal display, but it has image on external monitor. Alreay tried a known good display and good lcd cable, but same result.
Can you help?

 

[2informaticos]

Any history available, liquid sign near LCD connector?
Missing backlight and image too?
Check diode mode to ground on video data lines, especially AUX channel.

 

[hgoncalves]

Hi,
The client says that it stoped working by it self.
I think that I don't have backlight, becausei get 0V on PPVOUT_S0_LCDBKLT (C8500).
I can't identify witch are the video data lines. Can you, please, specify them?

 

[2informaticos]

"I can't identify witch are the video data lines"
What about EDP_INT_ lines?
3V3/5V_S0SW_LCD present at least in the first seconds (when chime)?
If yes, DP_INT_HPD goes high at same time?

 

[hgoncalves]

Thanks.
When measuring, I notice that on cap was shorted (C8460). After replacement it worked.
Tks