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Pins 28-30 of J8300=0v 1 & 4 of U8330: 0v L8300 is OK.

Unit had water damaged close to R5498 and C5549. R5494 : 17.75v. Fan spinning normal, CPU is not getting worm. Missing EDP_PANEL_PWR_OR_PSR_EN on pin 1 R8319 Have PP3V3_S0 on pin 8 of U8330 . PP5VS4 is present. PPVCC_S0_CPU: 1.69V Known good display connected. Dont know what to next, any help...

yes , make it done.

I replaced it and tested ok, thanks a lot all you guys.

resistance to ground on D7701: P1=.392 AND P2=.538 ( after changed fuse ) ball A5 of U7701 looks very good. Should i try now to check Bklight?

I found c8317=.539 ( dm) with screen. j8300: p3/4=0v, 18/19=3.3v, image yes, Bkl-En=0, pwm=1.47v

Found F7700 is blown, before changing it what should i check for no more trouble.

I used Fluke 114 True RMS.

i ordered DMM. Post later. Thanks.

c5021,PP3V3_S5_AVREF_SMC=3.29V ( you are genious! ) Voltage comes from pin 1/U5110=3.4V I dont have oscilloscope , i dont know how to check signal.

it was missing Q3080, i add it and now U5110: P1=3.41, P3=3.41V,P4=1.7V, P5=3.3V, P6=3.3V, P8=3.2, P7=3.4V U5000: c5021,PP3V3_S5_AVREF_SMC=1.2v PP1V2_S5_SMC_VDDC=1.2v PP3V3_S5_SMC_VDDA=3.41

Trace of pin25/U7501 to Q7560 looks ok. PPBUS_G3H=8.2v 3V42. ,u7090 p4=3.41v U7501. basic voltage:p2=0v, p4=0v,p5=0v,p25=0v

no more today, see you Monday.

i changed both U7501 and Q7560. No short on L720/60. R/C7564 are ok. Now there is no light and not turn on too.

It was water damaged near U7501 and pin25, sw2, P3V3_S5_LL is missing, so should i changed U7501 or q7560 ?

yes , that right it goes to login screen again when press trackpad click.. I dont have issue with login screen. Issue is if i dont sign in within two minuites it shutdown itself. I did google and see some people have the same issue and no solution.

No, this is not stand-by, totally shutdown. i turn it on manually again and if i dont login within two minuites it shutdown again.If i login, it work fine, All tested passed. Is it a big issue?

yes ,show password screen if press trackpad click. Did a PRAM reset and goes off. During boot menu , NOT goes off.

When turn on the mac and login with password it works fine but if not login within 2 minuets it shutdown itself. Is it hardware issue or something else? Before it was dropped from 1 feet on carpet and no backlight . fix it but now see this issue. No idea what it could be. Thanks in advance.

Right now i dont have SMC, i will post latter when i will get it , Thanks for your assistance.