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While holding down D, it takes me to the Starting Internet Recovery Screen, then it wants me to connect to the wifi. I type in the password for the wifi, and it just sits there spinning and never connects.
Well, when I hold down the Option key, it does detect the macOS image, I choose it, and...
I did confirm with another iCloud locked motherboard that the shell, everything is working fine.
I did however decide since J6700, the clip was damaged and I had been using kapton tape on top to make it snug. I ended up replacing the entire J6700 connector from a donor board. While doing so, I...
Flex and board look good.
I am not 100% certain which ones are the data lines, nevertheless T2 data lines? I am assuming the data lines are the ones with "SPI" at the beginning?
SPI_MESA_MISO_CONN: .494
SPI_MESA_MOSI_CONN: .516
SPI_MESA_CLK_CONN: .515
My reference only: REF1131
Board has liquid damage.
Computer turns itself on even if I hold the power button down to shut it off. Just keeps turning itself back on.
There is no OS installed.
I try to run Apple diagnostics and it wants to connect to the internet, I type in the wifi password and...
PPBUS_HS_CPU only has .800. I noticed U7270 had corrosion around it so I replaced 3 caps: C7273, C7273, CD7A2, and reflowed U7270. I noticed the processor started getting hot so I hooked it up to the external display and I am getting picture now. The spinning globe was cutting in and out at...
No U5600 is not, however I decided to check pin 5 in diode mode and noticed it is supposed to be .351 but I get .402.
Moving on...
L7730: 1.053
L7370: 1.048
My reference only: REF1121
This board has been wet and prior repair attempts have been made.
I get nothing for PP3V3_TBT_X_SX but I do get PP3V3_G3H_RTC.
I have replaced the following: U8225, U8320, C3106, C9062.
I reflowed U7000.
Not sure where to go next?
I am getting pulsing anywhere from 0v to .05v.
0v
When I try to chase this backwards, I do get 3.4v at SMC_CPU_ISENSE, but next down the line CPUVR_ISUM_IOUT I get 0v. Thermal cam shows the areas it is heating up at when plugged in.
At first pin 2 is at 3.3, then after 15 or so seconds, it drops to 0, then it went back up to 3.3 after another 10 or so seconds.
Don't know if this is relevant but I also get NO voltage on CPUVR_FB_R_3 at all.
My Reference only: Ticket # REF1124.
Board has liquid damage. I was getting video prior, now I am not getting video. The board is heating up. There is quite a few audio sections that got burnt at some point but I would imagine this has nothing to do with the video?
R3453 Pin 1 in diode mode...
Update; fan is not spinning so I placed down kapton tape over the cables since some of the clips were missing. This did seem to help because now I get the keyboards caps lock light to come on. The fan still does not spin and the globe just got stuck when doing an internet recovery for the first...
For my reference only: Ticket # REF1131.
Liquid damaged board.
When I try to do an internet recovery, the mouse is super laggy and slow. The keyboard light does not light up, but the keyboard is definetly working, it allows me to type in the wifi password. The fan is not spinning fast. I am...
Yes, assembly screen is good.
BKLT_EN_R I get nothing.
R8450-53 all look good.
BKLT_SCL is at 5.1v, SDA is also the same voltage.
Q8400 pin 1= .045, pin 3=12.27, pin 4= 12.58
My reference only: Ticket # REF1125
Board has liquid damage, I have replaced the following from a donor board: Q8401, Q8400
New chips piurchased and replaced already: U8510, R8402, C8411, R8433.
I have 0v on LCDBKLT_FET_DRV. I cannot seem to track down why there is no backlight. I have ordered some extra LP8548B1SQ chips.
Board had pretty bad rust and corrosion. At first I was getting video on the built in display, but I stuck the board in my ultrasonic cleaner and now I have no video. I am assuming the ultrasonic cleaner did more harm then good. I am getting no video on the built in display, and no video on an...