rob777
Member
Laptop would power on and got a screen on external monitor. No screen on laptop and no trackpad but keyboard does smc resets.
Started measuring power rails, found pp3v3_s3 is only 1.5v wherever I measured. Obviously.
Ended up at R7811, looked shit. Changed it. Laptop worked screen came on trackpad worked. Turned it off to put back together.
Then upon reboot, same symptoms came back. Measured R7811, pin 1 pp3v3_s3_fet_r is 3.3v
Pin 2, pp3v3_s3 is 1.5v instead of 3.3v
I replace R7811 again and still only 1.5v pin 2.
What is it that I'm missing here, feel like it's blazingly obvious..
Thank you.
Started measuring power rails, found pp3v3_s3 is only 1.5v wherever I measured. Obviously.
Ended up at R7811, looked shit. Changed it. Laptop worked screen came on trackpad worked. Turned it off to put back together.
Then upon reboot, same symptoms came back. Measured R7811, pin 1 pp3v3_s3_fet_r is 3.3v
Pin 2, pp3v3_s3 is 1.5v instead of 3.3v
I replace R7811 again and still only 1.5v pin 2.
What is it that I'm missing here, feel like it's blazingly obvious..
Thank you.