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No it won’t boot I have a stage light affect on both screens kind of like when a tv hoes to sleep. I was wondering if maybe this issue is like a lid closed Affect or SMC_LID_R. Issue? Where the screen thinks it’s closed?

I wanna say it’s on but leds are very dim it’s not noticeable with lights on. Black not white but barely visible. I made a video but I can’t upload it. I will pop it in a case now see what happens

J9000 Pins 2&3 =3.3v 4 = 3.3v L9010,L9011 have continuity L9000 has continuity

Ok so Once I put wire connected directly to lvds backlight is on. just extremely dim BKL_PWM=2.5v I would think With that voltage it would have some brightness. But I also might be up against no image on this one :/ As I don’t have a flashing folder. Usb mouse connected and have activity and a chime

Ok so I test for voltage at c9797 and got 0v D9701 tested good Q9706 Was internally shorted replaced Q9706 and have 40v at C9797&C9799 but not at C9000 or pins 38,39,40 on lvds connector tried running 30awg from C9797&C9799 to pond 38,39,40 and got no backlight. Resistance to ground on these...

BLK_EN =3.1v Blk_PLT_RST_L=3.3v LCD_BKLT_EN=3.3v LCDBKLT_EN_DIV=4V BKL_PWM=2.5v resistor is 33ohm I’m thinking Q9706 is bad :/

Yes I have image no backlight. I have all the enable signals. The resistors on the voltage divider are good and capacitor isn’t shorted. The voyage is 11.53v at gate of mosfet. I believe the mosfet isn’t sending it to ground. But I dont have the part# on my phone it’s on the notepad at home...

Ok fan spinning ,Chime. Steady 1.8v now on to backlight issue. One question is there a downlink for MRI (resource inspector)

Ok. I recheck R7720/21 one question can I power on this board wIthout u7720 and L7720? I wanna make sure there’s no spikes on 3v3_s5 that might kill it again

With u7720, L7720 soldered t’s 22ohms 260ohms is with both unsolder

With removed L7720 and u7720 Pin 2 =260 ohms Pin 1 =OL I also removed Y5010 And put it aside before removal of u7720 it was 0.v to ground On pin 1 with L7720 removed. after removing U7720 pin 1 shows OL

L7220 =5v PPVCORE_S0_CPU_PH1/PH2/PH3= 0v PPVCORE_S0_AXG_L=0v I had a issue on L7720 and that’s still .0v in diode mode to ground what can kill this IC for a second time ?

Well PPBUS_G3H is 12.53v PP3v3_S3 =3.3v PP5v_s3=5v PP3v3_S0=3.3v PP5v_S0=5v PPDDR_S3_REG_R PCH is Warm CPU is warm I just flash Gmux in everyone of these Even if its working. just in case.

Hi I received a board and it had 1/4 fan spin Replaced c7721 it was Still shorted then replaced u7720 and got the board working Chime, booting, activity on screen but no backlight. After using dosdude gmux I still had no backlight replaced lp8550 and fuse :( now the board is dead again I...

I replaced u5388 once more it’s Back to zero again and no I just replaced u5388 today.

Ok I will find another u5388 somewhere and report back is it possible that when I leave the board running it starts to work better somehow ? Sometimes the lines are there then they’re gone.

I thought it was Connected to a current sense resistor And If pins 4&5 ISNS_CPU_N/P =12.56 and PPV3v42_G3H =3.42v it would send Out SMC_CPU_HI_ISENSE is that incorrect? Ok so 3.3v is no good? I took U5388 off another board. So zero is ok ? I’m not sure what this line represents and what state it...

Ok it is indeed charging the battery I discharged the battery on the board with no battery it went down to 10v then I plugged in the charger left it a while and it went up to 11.10v PP3v3_S3 lines all exhibit .749v when no battery is present With battery present on all these measurements...

ok so what I’ve found with battery disconnected I have to hold the power pads down for 2-3 seconds and the PP3v3_S3 line comes up to 3.3v with out battery. I don’t have PP5v_S0 When this happens and I mean nothing not even trying to start. Shouldn’t this board power on when a mage safe is...

No I used hot tweezers Also, I just checked PP3v3_S3 and something just started pulling down my PP3v3_S3 line. I had solid s3/s5 lines I’m sure of it. Now it’s .731v :( I will get s3 lines up again and let you know if it charges