820-2936 no backlight. Sometimes it has backlight

Hi there!

Have an 820-2936 here where i thought the LVDS cable was the issue. I thought it had no image. When i replaced the LVDS cable it worked for about 5 seconds. then the backlight came on and off repeatedly as if the macbook was going to sleep and waking up. It was a fade backlight animation and not a straight on/off. then backlight went out completely.

have tried another LVDS and the backlight is completely off with several LDS cables

board looks pristine
 

2informaticos

Administrator
Staff member
Does the image remain, only backlight goes off?
Check LCD connector first.
Next, check XW9720; continuity between pin2/D9701 and FB/U9701.

Don't forget to measure SMC_LID signal.
 
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