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it runs off of battery and charges just fine. keyboard is fully responsive its just when its turned off and unplugged that it wont respond to the power button. also tested in a known good machine and same issue

So this machine runs fine battery is detected and charging. issue is it wont turn on unless power adapter is plugged in. I cannot pinpoint the issue any ideas? This board had prior water damage and was cleaned by someone else. seems like the power button is unresponsive until adapter is...

Ok i looked up how to do it. How can i tell if im in smc bypass mode? well i think it was a power button issue. Maybe it was stuck somehow after pressing it various times the issue seems to have stopped.. well it came back again..

So this is a macbook i fixed about a year ago initial issue was 2 damaged caps from possible water damage. so customer tells me it wont turn on. I go look at it and I see the hard drive light is on but no life on the macbook as if its just restarting losing power and repeating. i take it open...

Smc_adapter_en = 3.4v pm_batlow_l = 0.011v smc_pm_g2_en = 3.4v pm_slp_sus_l = 0v ok so i noticed thunderbolt is tied to u2600 figured if thunderbolt blew it took that chip since the rtc pin was outputting 1v replaced and it powered on!

history is severe water damage i completely cut off the thunderbolt circuit and replaced everything that looked severely damaged also restored some power rails. reflowed smc which brought back charging orange light while battery connected. I do get a green light. so im down to the 3v3/5v_sus not...

With screen connected. pin 5 = 5.15v pin 9 = 12.88v pin 10 = 12.88v pin 11 = 12.68v pin 15 = 3.7v pin 16 = 3.7v pin 17 = 3.3v pin 18 = 5.15v update: ok so issue was the video cable was water damaged as well on display side swapped cables now it works!

anyone know where i can purchase a stencil for this gmux chip?

pin 3/4 on edp connector are 5.15v without screen connected and resistor's connected to those pins measure fine. screen unplugged d7710 pin 2 goes from mohm and goes up to kohm then restarts / pin 1 is 11mohm and goes up slowly screen plugged in does the same as above. feedback resistors are...

I get 3.7v on those pins and im pretty sure its the original display. Unless someone swapped it.

bklt_en_r is 3.3v i get 12.9v now on pin 3 and 4 of q7700 but i was also getting 11.9v at one point when screen was connected seems to have gone away. i did multiple pram resets even smc reset nothing has changed. i do not own an o-scope sadly.. I did however boot into OS and pressed the...

yes removed j6100 and yes blown traces were the issue. fixed!

ok so this backlight has been kicking my ass all day. im not getting 12v past q7700 ive checked traces even resistor values are ok. one thing i noticed is when i connect the display i get around 11.9v instead of a 12.9 when i disconnect the display i get 12.8 volts or so. so could it be a bad...

yes its an original apple branded bought from store 85w charger. it doesnt turn on with battery connected. pm_batlow_l get to 3.3v with it connected. update: ok so it does infact turn on volume setting werre low and backlight is out i do see a folder when flashing a light to it. so theres that...

yes its 3.3v

board delays to turn on, once fan spins it will spin for about 5 seconds then stop and spin a second time and stay on. no image on display, no chime, no image when connected to external, cpu gets hot and when connecting a usb mouse it has power i thought it was bios but nothing changed after...

I get a magsafe light and using original 85W apple charger. History of the board was water damaged but cleaned by someone else. i did notice some damaged components around and including R1410 area and have replaced and reattached traces. PPBUS_G3H - 12.60V PPBUS_S5_HS_COMPUTING - 12.60V...

i guess this was another case of everything needs to be connected to run fast. im assuming certain bios require it cause ive gotten a mixed batch of boards that run fine without everything connected. well its working now. thanks.

board fixed itself apparently.

pp3v3/5v_s5 = present PPBUS S5 HS COMPUTING = present PPBUS S5 HS OTHER5V/3V3 = present PPDCIN_G3H_ISOL = present PPDCIN_G3H = present PP3V42 G3H - present PPVRTC G3H = present PPBUS_S4_X239 = not present PP5V/3V3_S4 = not present - no pulsing no PM_SLP_S4_L - no pulsing no PM_SLP_S5_L - no...