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hi guys. i have board 820-2850 with no backlight. voltage checked: BKLT_EN : pin 4 3.12v (is that a problem?) PP5V_S0: pin 23 4.95v d9701: pin 1 12.61v pin 2 24v not sure what i need to check more. still learning anybody can help. its emergency job !!! :)

i have board with was water damaged. replaced few components with was look bad but still no sign of life.: PPBUS_G3H : 12.6v PPDCIN_G3H :16.37v PP3V42_G3H :3.41v SMC_BC_ACOK_VCC: 3.42v ADAPTER_SENSE: 3.42v any idea why light is so dim and no power up ?

Strange situation here. 820-2850-a no powering up no green light on charger. checked voltage: PPBUS_G3H: 12.64v PPBUS_CPU_IMVP_ISNS: 12.63v PPDCIN_G3H: 18.99v PP3V42_G3H: 3.41v PP5V_S5: 4.99v PP5V_S3: 0.00v

[SOLVED]820-3115-b powering up with green light on charger then turning of after 5 second 820-3115-b powering up with green light on charger then turning of after 5 second and green light going of. any idea?then when i disconnect and connect again green light coming on and powering up and do...

i have problem here. water damaged 820-3115-b with i replace all components with was water damaged and clean main board but is not powering up. green light on charger pulsing . any idea. i know there must be some short but how do i find what is doing it? I know there is few people who had this...

hi . i have 820-2838-a dropped on the floor and now is no display and fan spinning fast . anybody had this problem b4?

hi guys. i hack of screen still have very strange problem here. 820-3437-a . laptop powering up ok and showing me login profile. i put password in and press enter then laptop losing picture and when i look it on the back still have back light but no picture. any idea?

hi.i have here 820-3115 just stop working. i have green light on charger but not powering up. PP5V_S0 - 0.286v. dont know how to fix it. i replaced u7200 but still nothing

i have here water damaged macbook air 820-3023 and is not powering up. i measure some rails and i got PPBUS_G3H - 8.36v PPBUS_S5_HS_COMPUTING_ISNS - 0.00v PPDCIN_G3H - 16.87v PPVRTC_G3H - 3.4v PP5V_S5 - 5v PP5V_SUS - 0.000v

820-2915 . goy it with no green light on charger and on battery connector 12v was missing . replaced r7051 coz was faulty and u7000 also Q7030 and Q7035 now i have 5v jumping bettwen 12v on battery connector and fan trying to start up but no result. any idea?

I have 820-3437-b with fan spinning fast and no picture on screen. any idea?

i have motherboard where gpu number is wiped and i want to replace for new one but half numbers are wiped. how do i check with one is correct one? board 820-2915-a serial: c2qhk008drjd emc 2417

I have 820-2838-a board with problem. when i press power button fan spin for second and stop after nothing happen. any idea? aha. i bought this laptop with faulty magsafe. when i got it there was no green light on charger. i replaced macsafe board and now i have green light

Hi. I have strange problem with board 820-2936-b. When i connect charger to the board fan is start spin for 1 second and stop. then do this same non stop. any idea?

Hi. Long time i was not here. So i have here water damaged 820-3115-b board with was totaly dead. i manage to fix to state where is powering up and charging battery but when i disconnect power cable laptop is turning self of i checked voltage on battery connector and battery is charged. When i...

Hi. i got 820-2915-b board where was problem with display like always in 2011 15 inch macs. i replaced 3 chipsets but now is no picture at all but i can hear sound on start up. checked two working screens and is not that. also is not a backlight for sure, i checked with lamp. any idea where to...

Got problem with board. Looks like cpu maybe faulty but will ask for opinion b4 i will put in in scrap. R7402 : pin 2- 12.58v pin 1- 0,63v R7403 pin 2 -12.58 pin 1- 0,58v U7400 : pin 46- 5,03v U7400 : pin 47 -3,3v what should i check next?

I have 820-2915 board with problem. In system says no hardware installed. i done all smc reset, pram reset , replaced wifi cable and wifi card but still no wifi. Also there is not bluetooth. any idea? L3406 pin 2: 3.337v L3404 pin 2 : 3.443v

Hi. i have 820-2915-b no backlight. i replaced lcd connector and also u6701 and still no backlight . F9700- 12v pin 1 and pin 2 R9731- pin 1 0.430v and pin 2 0.122v Q9707- pin 2 3.34v pin 5 0.036v Q9706- pin 1,2,5,6 0.0053v any help?

Hi i just got delivered this microscope amscope with 3 mp camera SKU: SM-4TPZ-FRL-3M and am looking on laptop screen when i move motherboard is not smooth . any idea or program recommended to record my work? am using program with was included with microscope but is not look like Louise videos