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having a 820-3115 board,minor spilled around u2600 area and near area. so replaced u2600 and ultrasonic cleaned the board. everything looks cool , no corrosion. but board still the same condition when it was sent in. 1/4 fan spin, spin off, then spin on then off , repeat again and again. check...

having a strange 820-2915 board here. previously it was fixed for the GPU replacement. and worked and tested. 2 weeks later customer returned and said no power at all. so we checked, the machine can power on with DC power supplier or fake knock off charger. but not apple genuine charger...

machine got liquid spilled. no power , big area spilled and fixed. power on then got the typical battery not being detected with "X" want to mention first, q7155 was shorted and bad, replaced. (previously board can't power on when battery inserted) . ok , so SMBUS_SMC_5_G3_SCL=3.3v stable...

820-2915 ,battery "X" not being detected, not the simple cases usually encountered Hi guys,having a strange 820-2915 board giving me headache. problem is battery not being detected, thought should be a piece of cake as fixed a lot previously already. usually only 3 things , which all had been...

Hi Im having a 820-3115 board. all voltages present, but no video or image on screen. not the no back light ,but no image. when plug in usb mouse, the light is up. no beeps, no chime, can't find liquid spilled. where should i start? thanks

Having a 820-4924 board with no power. board looks perfectly good condition. no liquid spilled or previous repair attempts. green light. PPBUSG3H , PP3V42 all present and normal. missing pp3v3_S5, which has only 0.3-0.4v. Checked U7501 pin23 vin=around 12v pin 29 and pin 22 =around 1v...

Having a 820-3476 ( SN check shows late 2014) a1502 boards. board had liquid spilled, got previous repair attempts. wasn't professional. so I ultrasonic cleaned the board, found that it doesn't charge, always show the "charge machine" logo. but never get to power on. found that it's short on...

Hi I having a 820-2915 board, no liquid spilled. all power rails present but the CPU VCORE. checked on u7400,pin 40,24,15 are all 5v pin 2 TON=11-12V pin1 EN=3.3V replaced u7400, but no luck,still the same,any seen this before or any thoughts? thanks

Here we go again, 820-3330 video distortion. I TRIED everything I could think of. GPU,VRAM, Caps, MUX,damn none of them work, what else can it be? I m so confused about this board. Had seen so many and just can't get any of them to work...everything runs normal, no crashed, kernal panics or...

hi guys, having a 820-3115 a1278 board, short on PPDCIN_G3H. removed F6905. short is on the pin2 still. I checked and PPDCIN_G3H go to few places, then I removed almost all the components connected to it,including R6990,Q7085,Q5490. but still short to ground. it's "0" in diode mode. Look...

Had been in board repair field for quite a long time, started 2011 with those NVIDIA chipset laptops, now mainly on MAC logic boards. Pretty confident about the skills I have and having more and more customers as well. but now here comes the problems where got me stuck . There are only so much...

having a 820-3115 board. all power rails present but can't post video, always one beep and goes a loop. PP0V75_S0_MEM_VTT_A=0.75v pp1v5s3 ddr =1.5v cpu vcore 1.1 around having no clue than a dead cpu or PCH, any thoughts please? thanks

in recent few days, I got two more 820-3330 came in. shoot, pretty much same problems as the ones I encountered previously and didn't solve. video issues, sometimes switch to NVIDIA graphics then it freezes, sometimes just distortion. (not like the mux kind color distortion,but like the whole...

I had been using arctic silver 5 all the time and lately just found that a lot of people complained about it and said not good for the Macbook pro heatsink design. so just wondering what's the best kind you guys are using. thanks

Hi guys, having a 820-3115 board, powers on, green light and all power rails are there except CPU VCORE. the board got liquid spilled around the SMC area and U3890. U7400 area looks totally fine. so checked : CPU_PWRGD =1V ALL_SYS_PWRGD = 3 V u7400: pin 46,29,19=5v TONA, TONB= around 1v...

I have two A1502 came in today, identical machines with 820-3476 boards. problems are the same, machine can power on, chime , back light will be on (after it chimes and wait like 20 seconds later). sometimes no back light but still chime. if it has back light, then that's it, no flashing...

having a 2011 a1286 with video issue. there is very common video problem of this model ,usually we replace the GPU then it's done. but this time is not that kind of typical ones that we deal with every day. not the white screen can't boot into OS, shut down ,restarts. or the step by step...

having a 820-2850 board got liquid spilled,area around connector and led back light driver circuit. got no back light. PPVOUT_S0_LCDBKLT=12v , means not boosting. checked: D9701 both pins are 12v lcdvdd en =3.3v pwm= 0.3v smc_lid=3.3v pin 8 pin22 and pin 23 on u9701 all have correct voltage...

Hi guys having a 820-3330 board. machine can't boot into OS most of the time, sometimes it does, but running slow, like the kind of SMC sensing issue. so ran ASD on it, all sensors tests passed. I ran every test and only get one error when we ran the thermal interface Processor 0 Tim test 75...

having a 820-3115 board, had liquid spilled on. U7000 was bad and replaced. then ppbus_g3h came out. it powered on but no back light, fixed that as well. then ran testings in OS. found battery not being recognized. X mark,traced down to the SMC. and replaced it... damn then the machine has no...