[SOLVED]Noise in video 820-2936

[MDY]

Liquid board arround lvds. I replaced lvds connector and reflowd some areas. LVDS and screen was also damaged so I replaced LCD cable and screen too.
Now I have video but there is noise like in the image. When boot to OS X is worst (red noise). I checked lvds again and it is solder well. Any thing that I can check?

 

[dukefawks]

Measure diode mode on all the LVDS lines at the LCD connector.

 

[MDY]

I compared with working board and I found only different in pin 34 - LED_RETURN_1
WORKING BOARD - 534
FAULTY BOARD - 1

I checked R9717 and it is 0 ohm

 

[dukefawks]

LED return has nothing to do with LVDS. Bad connector soldering or bad cable.

There is also no pin 34 on a 2936 board, it's a 30 pin connector. I assume it is 24 and it seems shorted to GND, likely due to bad soldering on connector too.

 

[MDY]

Sorry, it is pin 24 and in my schematic it is pin 24 - LED_RETURN_1
Also 1 I mean 0L - open line. Not 1ohm.

So in working board I have 400 in diode mode red in ground and in faulty board I have open line in pin 24. No conexion betwen R9717 and pin24.

Tried another screen and lcd cable assenbly and same problem. I can see red noise in screen.

 

[MDY]

Could be bad PCH or CPU?

 

[dukefawks]

Did you even read my post #4?

 

[MDY]

Replaced LVDS connector again and it is ok now. Thanks