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Magsafe is always green. PPBUS_G3H is 12.6V stable without battery.

This was at first intermittent but it now consistently is not charging. This board boots and runs normal otherwise on charger only, or battery connected. I've tried with and without BIL connected. SCL/SDA diode readings look good at .522 and .518. resistance pins 17/18 and 27/28 are good. Diode...

I don't have another known good screen to test with...

This is odd to me so I'm not understanding how the backlight in the display is designed. I have 69V at both pins 6 and 12 of J8200. I have image on the display but no backlight. I've checked for conductivity in the backlight cable that terminates at the bottom corners of the display and there is...

I wasted a ton of time on this board. Once I realized the short on PP5V_S3, I pulled the usual suspects: C6213/4 and short is gone.

DAH! I no sooner posted and retraced tracks and I have a dead short on PP5v_S3 *facepalm* I must've missed it when I checked coils previously.

I've got what I think is an odd situation. Green light on magsafe is not completely steady on, it pulses briefly and consistently. Same with SMC_PM_G2_EN it ranges from 1.7 to 3.4. And DCIN fluctruates a little 16.5-16.8. I've changed SMC and U7941. With U7941 removed, SMC_PM_G2EN and DCIN are...

I don't have one to refer to but it looks like based on other threads it should stay at .75V. PUlling those components prevents the board from starting. It won't draw more than 5V. voltage readings on U7800 side that circumstance is .3V. Just to see what would happen, I tried injecting .75V for...

Yes. Through other suggestion being that I couldn't get DFU, I reflashed T2 Rom by pulling chip and placing back, but logic board behaves still the same.

I have an A1990 board / 820-01041. Voltage starts at .75V but drops to .54V after a few seconds on PPVDDCPU_AWAKE. Board goes to 20v and drops to 19.95V drawing 1.4A but no USB activity or inclination that it is booting. Resistance to ground at PPVDDCPU_AWAKE seems low compared to donor board I...

I poked around UD140 and components near LCD connections with diode test and compared to my donor, not seeing anything but could replace UD140 just to see. I don't have a way to test the webcam without the customer but maybe I should just wait until customer comes in as I'm thinking these M1's...

Still gets ALS error without internal screen connected

I ended up discovering that I was missing power at coils at L5800/20/40 but everything looked good up til that. Tracked down to U5700 which had enable signal. All diode readings regarding U5700 and coils compared correctly to another cloud locked donor. Regardless because of lack of outputs, I...

PPBUS_AON rolls around between 10.7-12.3V

This Mac has a ticking noise. At first I thought when I opened this and plugged it in it was coming from CPU but it is really hard to tell and there is no voltage showing at CPU coils. DCIN is 5.15V cycling at 40-80 mA. Spots of corrosion in many areas of board but not bad really in total...

Compared to another board. Not seeing anything unusual from diode check of J6100

Good thoughts. I looked those over and not seeing anything out of the ordinary.

Yes. PP0v9_SSD, PP2V7_NAND and PP1v8_SSD all present

I guess Thunderbolt2 to thunderbolt3 doesn't work (both Apple brand) was trying with my 2015 A1398. No issues seeing its in DFU mode from a1708. NO luck though. Tried Revive first, checked with customer and got the green light on restoring it but I get a: System cannot be restrored on this...

yes. I have steady AWAKE and SLPS2R's related to 1V1, 1V8 and 3v3, PPVDDCPU