Recent content by Yoel Ren

found d3402 blown. but the line is not shorted. found usbc_xb_d2r_p shorted, from u2800. pulled u2800, and mac boot with 20v, just need to pull another chip and install it to the mac, thank you so muchh for the pointer

resistance between pin 1 and 2 of c7020 and c7023 is 2 ohm respectively, if that matters

diode mode 0.430 on both side of F7000. with f7000 removed, c7050 voltage is 0.2v ..

p_in 5.1v aux_det 1.05v tba_vdda 5.1v tba_vddp 5.1v aux_ok 3.4v amon 0v bmon 0v

does this machine need u2800 to switch to 20v ?

clean board, customer as usual just say nothing happen it just dead some day.. smc_rst_in 0v smc_usbc_int_l 3.3v have tried removing the redriver chip too, but still same problem

Hi, this machine came in dead, with 5v on both port, consuming about 30-40ma pp3v3_g3h is fine ppbus not shorted smc_reset_l 3.4v buf_smc_reset_l 3.4v Both of the cd3215 missing pp1v1 ldo, cd3215 has been replaced with KNOWN GOOD chip, still the same. any pointer ?

all the diode value is ok, compared to known good board.. maybe u2800/u2900 or the cd3217 itself ?

so both of the port, usb 3 doesnt work ( external hard drive for example ), but there's power as the hard drive is spinning. usb 2 device like mouse and keyboard work. charging is fine on both port too. used known good charging port, same story. diode mode on usb3 line r3012 : 0.363, both side...

I see you in other post recommending people to try remove the diode,even though measurement is good, just in case. so i tried removing d4600 and d4601, and sure enough they start to work lol. I thought diode only died by shorting itself, but it can interfere like this.. Replaced with donor's...

diode mode is 0.420 on all pin ( 1-4 ) on known good board without the u4650 bypass, diode mode is 0.650 on both side left and right side, is this acceptable ?

sry I meant, L4605 has 5v on both side. L4600 has good continuity on both side and same value too.

L4600 is good, theres 5v on both side. bypassed u4650,pin 1 to 7, 2 to 6, but still same, not detect wireless mouse / wired mouse.

hi, this macbook came in with some backlight damage, fixed that. Found out j4600 usb port has some problem. It will detect hard drive fine, but if pluged with mouse or wireless mouse receiver, or any small powered usb,it doesnt work. The other usb port is working fine. There's 5v on each side...

all big coil diode mode compared to good board is good. board doesnt start in smc bypass too... have tried reheating pch, smc, pmic , replacing tps519810A but still same behaviour