820-02016 No backlight

No-Clean

Member
Clean board but MacBook hast a dent on a corner, no corrosion.

PPVOUT_LCDBKLT 0.02V

Tried a different screen and same problem

UP800
PP5V_BKLT_A and PP5V_BKLT_A 5V
BKLT_SCL and BKLT_SDA 5V
BKLT_EN_R 0V
RP850 is OK diode reading is 0.430 but no voltage with screen connected.

All the above was the case at first, now there is no image any longer and of course no backlight.
 

No-Clean

Member
Yes sorry I forgot to mention that there is external video, already tried a reflow of the PM with good quality flux, but same thing, should I try the same with the M1 chip?
 

2informaticos

Administrator
Staff member
May help in case of broken solder under M1.
However, will not correct broken trace; which can be anywhere on the board.

3V3/5V_SW_LCD present, at least in the first seconds?
 

2informaticos

Administrator
Staff member
I suppose LPDP_INT_HGPD is also present.
In such case, internal LCD is correctly recognized.
You should have image at least...
 
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