Recent content by wtw0987

Are the CD3217’s from AliExpress any good? Don’t wanna try it really if they aren’t labeled in terms of where they were positioned on the board.

Yep its the U3100_X chip. Got a few shorts on the power pins on the chip to ground. Don’t own a donor board so unless you know a place that I can source one I guess my journey ends here?

Lifted U3100_X and got alot of corrosion. I am going to clean up everything and try to reflow it sometime next week. Diode testing the board without the chip and the chip itself aren't giving any shorts on any of the power areas.

Tried to get DFU mode working again today again with what you said and wasn't successful but the heat is now changed and the input voltage and current has as well. Now I am getting heat around U3100_X instead of U9080 and the input has changed to about .37 amps and 4.9 volts. Also the port that...

The port was correct. When you mean disconnect touch ID, I did it with the logic board separate from everything else, so I'm assuming touch ID was already disconnected? I'll try the PMU_ON/OFF_L pad thing, but I also tried a different cable too. the DFU_STATUS is also at 0V when the error...

I tried to get it into DFU mode today, but I keep getting an error on my other Mac that says "Cannot Use Thunderbolt Accessory - Connect accessory to a Thunderbolt port on this Mac." I've tried this on all ports on the Mac (Its a M3 15inch Macbook Air) Tried to do both the keyboard method and...

U7800 coils: 0V - PP1P05_PCH_EXT 0V - PPVNN_PCH_EXT 1.804V - PP1V8_SLPS2R 0.899 - PP0V9_SLPDDR 1.101V - PP1V1_SLPS2R 0.754V - PPVDDCPU_AWAKE 0.827V - P0V8SLPDDR_SW1 0.825V - P0V8SLPDDR_SW1 0.802 - PVDDCPUSRAMAWAKE_SW0 3V3_G3H_RTC_REG_R is 3.392V PP1V8_G3S is getting 0.1 mV PP5V_G3S_KBD is...

PPBUS_G3H_SSD - 12.32V PP2v5_NAND_SSD0 - .3 mV P2V5_SW1_TPS62180_SSD0 - 0.3 mV P2V5_SW2_TPS62180_SSD0 - 0.3mV

Seems like something I'm doing to the U9080 when measuring it or putting it on. Just tried to reflow it again and got the same issue as before and the thermal camera is getting a spike on U9080 right when I apply power again,

PPBUS_G3H is still 12.33V as well as PPBUS_G3H_SSD0, not getting anything for P2V5_NAND_SSD

Recieved the new part, reflowed all of the caps and resistors surrounding U9080 as well for good measure. These are the new values. expected actual PPBUS_G3H_SSD0 0.51 0.44 P2V5_SW2_TPS62180_SSD0 0.425 0.348 SSD0_TPS62180_FB 1.413 1.325 SSD0_TPS62180_SS 0.538 .545...

Gotcha, ordered one and will update once I get it and place it on the board. Thank you for the help, it is truly appreciated. This is my first ever repair as a fun side-project.

GS3 voltages were all still at 0. PP2V5 is getting 3.67V and I also noticed that PPBUS_G3H is now at 4.95V instead of 12V as it was before, U9080 is feeling a bit hot as well but I'm not getting anything weird when measuring the pads for it in diode mode so I'm not sure if there is a short on it...

I put U9080 back on the board after seeing the readings from above and I think it is functional. Here are the readings I got on the logic board with U9080 back on it expected actual PPBUS_G3H_SSD0 0.51 0.378 P2V5_SW2_TPS62180_SSD0 0.425 0.378 SSD0_TPS62180_FB 1.413 1.383...

Ah I see sorry wording was terrible there, the readings above are from the logic board without U9080 onboard, here are the readings from the U9080 pads directly from the backside of U9080 PPBUS_G3H_SSD0 0.584-0.6 on all pads P2V5_SW2_TPS62180_SSD0 0.517 SSD0_TPS62180_FB 1.38...