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I replaced the u8500 and have 5v but still no backlight.
Now the diode test is the same with and without LCD.
PPVOUT_S0_LCDBKLT - 0v
Can I connect LCD with a1708 ?
Backlighting is missing.
Unfortunately I have no known good lcd.
PP5V_S0SW_LCD 1.4V
PP3V3_S0SW_LCD 3V3
DP_INT_HPD 3.3V
Q8400
1- 0v
3- 12.5v
4- 12.6v
Diodemode D840 (red probe to ground)
pin1: 0.88
pin2: 1.2
Strange situation. R7744 was getting hot. I removed it. The short circuit was still present. Later, U7710 started to heat up, so I removed it and again the short circuit did not stop. Now the U8110 is heating up. Should I remove it ? This is the first time I have this situation.
I have a macbook 820-01598 which has 20v but black screen and without gong. DHU passes without error but still nothing displayed. Trackpad vibrates, capslock does not light up. I found a low resistance on L 7670 - PP5V_G3S 6ohm. Can I perform a short circuit test ?
no image, cpu gets warm no chime . Touchpad vibrates but keyboard light does not come on. Board are clean. can't turn on dfu
L7410/20/30 and L3500 0v
PLT_RST_L 3.3v
R3090/98 are ok
PP1V1_SLPS2R 1.1v
PP1V8_SLPS2R 1.8v
PP1V2_AWAKE 1.2v
PP3V3_AWAKE 3.3v
PP1V8_AWAKE I connected the board directly to the 12v power supply. not sure how to explain it but sometimes it is 1.8v and sometimes it is absent.