A1707 BACKLIGHT problem......

[NIKHIL@1997]

hi.........i have macbook pro a1707,,,,part no 820-00928-A...BEFORE THIS LAPTOP CAME WITH BACKLIGHT ISUUE....also display brocken...
then i trace the board..found C8473 is short...then i replace the capacitor...backlight is ok....but after 1 weak this mac came return with same backlight issue.....
voltages
c8473:-58v ok
also i check with another display...so..what next

 

[2informaticos]

58V means no connection with LEDS strip.
If already tested with compatible LCD assembly, then change the small video cable.

Be sure to get good contacts at J8500.
Check continuity from J8500 to D8410.

 

[NIKHIL@1997]

How I check the connection from j8500 to D8410..........because there is many connection pins in j8500..
If there is connection OK with led strip...how much volt come in C8473

 

[2informaticos]

Each line has a proper name to search in pdf.

Normal voltage is close to 45V; can only be measured with LCD connected.