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yes they do

Pin 3 off u1950 is pulsing with pins 5 and 6 joint but PLT_RESET_L not pulsing and in SMC bypass mode the board dont turn on

Yes pin 3 is pulsing with pins 5 and 6 joint

Sorry for my bad english and thanks for your patience! With pins 5 and 6 joint the motherboard won't turn on

ping 5 pulsing ping 6 gets low

U1950 Pin 3 is low Pin 7 is pulsing PLT_RESET_L is low without Q8150 i get the same readings

In Smc bypass don’t turn in L7320 pulsing L7310 pulsing L7630 pulsing L7430 pulsing Diode mode read in other rails looks fine PP5V_S0= 0.4 PP3V3_S0 = 0.35 PP1V5_S0 = 0.35 PP1V35_S3_CPUDDR = 0.135 PPVTTDDR_S3 = 0.5 PP1V05_SUS =0.3 PP1V05_S0 = 0.138

The diode mode read is the same with a good board. I heat the PCH/CPU with AMTECH NC-599 and still have the same issue.

Hi all, this board came with corrosion on u7200,i clean the area and i change the chip but still the same PM_SLP_S4_L missing but pulsing PM_SLP_S5_L missing but pulsing PP3V3_S4=0.4v (With 2 multimeters) PP3V3_S3=0.4v (With 2 multimeters) PCH_INTVRMEN_= 1.8V PCH_DSWVRMEN_L = 2.1V PPBUS_G3H...

No history available Chequing again U8100 i notice a short in pp3v3_s2_upc So i gon to inject 1v here and see if anything get hot

Hi this is a 820-02016 in 5.14v looping 0 - 0.08amps on both usb ports No power on from battery No DFU MODE ppbus_AON = 11.7v-12.15v pp3v8_AON_VDDMAIN =3.73v-3.76v When remove F5200 in C5254 i get steady 12.20v Diode mode PP5V2_S2= 0.2v PP3V3_S2=0.44v PP1V25_S2=0.29v U8100 COILS DIODE MODE...

Ok New Smc and the board is Ok! Thanks for the help

PP3V42_G3H = 3.46V PPBUS_G3H = 12.54V Remove R6961and still has 0-3.4v loop I change r5071 for a 10k resistor and still have the same issue :(

J6955 diode mode reed (disconnected) pin4 = 0.52v pin 5 = 0.77v pin 6= 0.52v Pin 8= 0.77v R6961 ok cap c6951 corroded but i changeit and still the same with smc_lid

Hi!! the same result, up down 3.4v to 0

Hello Guys So the screen turn on and off Tested with good display Smc_lid up and down 0-3.4v BLK_EN 3v

Hello, this is a 820-01521 that came attached 5v 0A In the reads, PPBUS_G3H and PP5_G3S were shorted. I injected 1v to those rails and found that C7675 Q7660 was damaged. By removing these components PPBUS_G3H has a reading in diode mode of 0.456v but PP5V_G3S is still under 0.042v (diode mode)...

When trying to restore I have a different error and it does not complete the process :(

Came from another workshop, but no sigs off corrosion or work on the motherboard. The battery seems death,I will find another to test again I didn't do anything special to get the 20v. When it arrived, I used the usb tester and it had 5v, then I removed the tester and put the mac in DFU mode...

Hello, sorry mi English. This is a 820-01521 MacBook Air that came not turning on whit 5v stuck. Connected the mac in DFU mode and apply a revive option but shows the 75 error . Now the usb meter register 20v but in DFU mode have the same issue. In some YouTube video saw that maybe the issue...