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I have macbook board 820-00138-A somebody try to do something on it has no physical damage no water damage. I measured for all rails everything is present i have fan spin but no chime no image but i have vcore. there is no power on the USB ports going. The only strange thing i've noticed is when...

i have CPU Vcore 1V but when i put usb memory indicator light is not lighting up

I got it from another shop and i don't know what they did with the board i have voltage on the all the rails but no chime and black screen and there is no water damage

Yes it's A1398 motherboard number 820-00138- a . Thank you

what model number board is closest or similar to 820-00183 a to compare that has the BRD file???

I removed the filling around the SMC and i reflow the SMC that solve my problem thank you for your help Louis i appritiate it .

SMC_PM_G2_EN is missing. You think smc reflow would solve the problem ?

the damaged via is fixed that's the first thing i did Pins 1, 19 and 21 are perfect i have 3 flex cable between the dc in board and the logic board known to work i've tried a known working DC in board & known good 821-1722 flex cable Thanks for the advice to compare the 1278 boards makes a...

Pins 1, 19 and 21 are perfect i have 3 flex cable between the dc in board and the logic board known to work i've tried a known working DC in board & known good 821-1722 flex cable Thanks for the advice to compare the 1278 boards makes a lot of sense if you watch the old schematics

PP5V_S5 is missing i check U7501 i have voltage only on Pin 23 VIN that's PPBUS_S5_HS_OTHER_ISNS and pin 22 P5VP3V3_VREG3 the enable signals on pins 12, 21 and 4 they are all missing and that leads me to the SMC am I right ?

PP5V_S5 is missing i check U7501 i have voltage only on Pin 23 VIN that's PPBUS_S5_HS_OTHER_ISNS and pin 22 P5VP3V3_VREG3 the enable signals on pins 12, 21 and 4 they are all missing and that leads me to the SMC am I right ?

I have light on the charger now I'll continue troubleshooting why i don't have fan spin

All areas on the board are super clean just around U7090, so i just plug the same charger to my 15 inch macbook pro retina display and when i got green light i plug back to the board im working on and i get also green light but computer doesn't power if i plug the charger in my retina macbook...

It is small water damage in the U7090 area. C7094 was missing i put another cap im getting PP3V42_G3H also SMC_BC_ACOK is present and SMC_RESET_L is 3.3v i think all signals are present for the computer to get green light bu i don't have green light. At some point while C7094 was missing i got...

I have 820-2936-b water damage it was dead i fixed the one wire circuit but now computer is super slow im trying to run Apple Hardware Test takes forever to start the test after i start the test goes one bar the first step and it doesn't move from there also when i move the mouse is lagging. Any...

it is 180 ohm. I've noticed that i can install windows but not OSX im assuming is the GPU because when i try to install the driver for the nvidia computer got black screen also i was thinking that when osx is loading from bootable USB or OSX HDD is loading the drivers also thats why it can't...

GPU_FBVDDQ_SENSE_N is missing that's signal that should go in U8350 and that signal comes from U8000 pin 532 so called KEPLER FRAME BUFFER I/F I believe that's the GPU???? :(

Okay after long visual inspection I've burn my finger on Q8360 and Q8361 and on the other side is U8350 i measured around on L8360 i have 1.3 volts but im not sure why those two mosfets are so hot they work properly i think. Any ideas?

Another save mode boot plus Verbose mode the last message i see is hfs: unmount initiated on Recovery HD on device disk0s3 and it stops there.

on the mother board im missing USB_BT_CONN_P and USB_BT_CONN_P they are coming from U3510 i have 3.3V on pin 10 of U3510 and that's PM_SLP_S4_L i have VCC on pin 9