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No liquid damage, 3ports measure 4.98v .29a but one only mesures 5v 0.12a
3v3_g3h measures 2.5v on the 3 ports and 0v on the 1 port (bottom right when using macbook normally)
Are schematics available for this yet? im using a 000293
No liquid damage green light turns orange
G3h 12.55v,
Pp5v and p3v3 all present down to s0.
All_sys_pwrgd 0.070 not shorted to gnd
What makes all_sys_pwrgd?
No boot lIquid damaged only in U6100 area, pins 5678 were all corroded pulled the chip cleaned pads on board and chip resoldered and replaced R6102
Machine now boots but serial is unavailable in "about this mac" and in ASD,
Read info with medusa 2 "Fsys block not found"
Liquid damage in U5400 area and above smc, replaced u5400 and u5600 as they had no legs
replaced R5499 and R5498
Green light to orange, pp5v are all good but the last 3v3 rail only measures 1.7v and no short to gnd on it.
Board is getting a little warm near the thunderbolt port area
Board smells of shampoo but cant actually see any corrosion, charger was reading 5v replaced u7000 now reading 20v but 0.03a.
PP5v_s5/4 = 0v
PP3v3_s5 =0v
G3H = 13v
Nothing on screen or HDMI through usb-c, trackpad is clickable
Cpu gets hot but coils L7410/20/30 are all at 0v all other coils are measuring what they should be
Board has minor signs of liquid arround Q8400 area but no corrosion anywhere to be seen
Have an 820-3437-B here that does not want to boot into MacOS (Flashing folder). So I tried booting into Mojave through USB and still flashes as well but boots into Sierra via USB but the thing is, it also does not want to boot into Sierra via SSD directly (flashing folder). Was liquid damaged...
Machine cam in no boot with bloated battery, one of the PPVIN_S5_HS_COMPUTING_ISNS capacitors was shorted took it off.
Machine now boots but when loading macos about 1/8th of the bar is just restarts
Also are there any brd available for this? Board looks clean no liquid damage
No liquid damage or impact damage "just stopped working"
Haven't worked much on these new boards, please tell me what to measure as I have no idea where to start. U7800 is getting warm everything around it looks ok
PPBUS_G3H = 8.7v
3v3_S5 = 3.325v
5V_s4 = 0v
Have a macbook air 11" 2015 that was working, was in a middle of installing sierra and suddenly turned off (it was plugged in). Now does not want to turn on (quarter fan spin orange then green then orange light). Tried disconnecting battery and still the same. Reflowed SMC - same. Replaced R7121...
The machine arrived with no ssd and smelling of shampoo but no corrosion.
No idea where to start as I haven't worked on these before.
PPDCIN_G3H = 5V = 19kohm to gnd
PPBUS_G3H = -0.023v = 45kohm to gnd
PP3v3_G3H = 0v = 1.5Mohm to gnd
F7000 = ok
measured current resistors R7020 21 22 and R7060...
Original issue was liquid damage on the resistors under the CPU R1672 R1449 R1669 R1447, replaced them and machine boots and works perfectly.
But when shut down the machine will boot up again after 5seconds or so, power button is not stuck because if I hold it down while booted the shutdown...
User claims it suddenly flashed a white screen then stopped, when turning it on now it fanspins, chimes, backlight comes on but no image internal/external.
CPU gets hot but capslock doesnt work. Ideas?
Tried unplugging everything except dcin and screen, PRAM and SMC reset, same situation
No...
Screen sometimes works perfectly then will suddenly have lines running accross it then if you fiddle arround with the screen the image will suddenly come back again.
Is this something caused by a bad lvds cable? or somethig with the panels ribbon cables (ie have to replace screen)
I know its a longshot but does anyone know anything about these boards?
Very light water damage to about 5 spots on the board, nothing happens when plugged in with a genuine 87w-usbc charger.
tried measuring random things on the board nearly everything measures 0 except for a what looks to be a...
MacBook came in with quarter fanspin, turns out one of the legs of U6100 was ripped off the board. ran a jumper from the chip to the board and it is now booting
When booting about 1/3 of the progress bar the screen will flicker and will continue to startup normally, but if it doesn't flicker...
Previously worked on machine, notes from previous repair shop "battery not detected, replaced ISL and reflow SMC"
When it got here not even a green light, replaced SMC and ISL then G3H was measuring 1.3v with 8.9ohm to gnd short and GPU was getting hot.
Q8930, Q7550, Q7510 looked rusty so...
Severely fucked macbook arrived, cable to one fan is cut keyboard connector has been molested and the battery connection block thing was put in the wrong way round.
After putting the battery connector block in the right way, it chimes and boots but no image. External display working fine, the...