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Hi, I got this device with liquid damage.
Mainboard is cleaned and was not many liquid to see.
The display is not working. with another display the machine is working good.
The big connector looks pretty good.
I found that there is a burned backlight connector. So i soldered a nice...
I have this device here, no green/orange light, dont turn on.
found short R7121 Pin 1 to ground and high resistant R7121 and R7122
after replacing u7100 there was no short anymore.
So i replaced the R7121 and R7122 after that all was ok but i found there goes 6A in to the machine.
yes, that was for me the intresting part as well.
now i checked again and yes there is no 5V_S0, but I replaced already U7600 inbetween
so I measured bad S4 or bad S5 and have now a bad U7600. I am gonna replace it again and will post the measurements after that.
hi, i am just workin g on this device, no problems to see on the board
first green led is lightning, no reaction by pressing power button
platform reset is still low
i have 3.41V, 3.3V_s0 and 5V s0 and 12V_S0
I dont have PP5V_S4_REG
PP3V?V_S5_REG is ok
I have here a late 2011 untouched Mainboard. Customer told me he had problems with the GPU and they switched off the gpu. of course a external moniotor is not possible and preferences shows only intel gpu.
Machine is working good, the rotating donat is showing up as well.
I want now to...
Thanks for your help , I was searching now 2nd day and finaly I found missing r7718, knocked off, I dont can explain me how it was knocked off.
After replacing it everything is working like it should be. thank god! :-)
I got an a1708 with no big liquid damage. After replacing Topcase and Battery everthing is working good. The customer was happy, but now he came back after 6 month with audio problem.
I found during I replaced the topcase I damaged the flexcable from the headphone jack port. I...