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  1. M

    820-2914-A No image

    Hello Everybody Working on no video problem macbook pro 17" 2011 ( I know apple extended guaranty for video issue but no video is out off warranty rules) Machine turn power on I can here star dong sound Mac OS loading and i can up and down volume No video build in LCD and external display...
  2. M

    [SOLVED]820-2530 TS0P unable read error

    Hello everybody; I m working on A1278 2009 year. Fan noise and CPU usage %100 . When do ASD it shows TS0P unable read error. Tried; replaced track pad and cable replaced bluetooth and wifi cable with know good cable replaced SMC same status where can i check next step? thanks
  3. M

    820-3437-B 3 short beep

    Hello; When power on 820-3437-B 3 short beep error. ( Customer said 1 years ago liquid damaged and cleaned other service and works fine until suddenly stop) It sounds like memory error and looked for corrosion but cant see and measure ; PP1V2_S3 = 1.19V PP0V6_S0_DDRVTT = 0.6V where can i...
  4. M

    820-4924-A No Backlight

    Hello everybody; I m working on 820-4924 (Retina 13" 2015) no backlight problem, No liquid damage or drop. Tried another known good LCD and data cable. - F7700 = ok and 12.5V - Replaced U7700 nothing change - BKLT_EN_R = 3.3V - PPVIN_S0W_LCDBKLT_R 12.5V ok - LCDBKLT_EN_L is 12.5V ( it must be...
  5. M

    820-2879-B not power on

    Hello Everybody Magsafe light is green and when battery charging orange but after hit power button orange turn green two second later turn orange not fan spin or anything. No liquid damage,no drop When measure PPBUS_G3H = 12.5V ( when hit power button its start to down until 2v, magsafe...
  6. M

    820-3115-B Power up and down loop

    Hi everybody ; No corrosion and not dropped machine; When Push power button fan spins but no sound,no screen,not light on status led and power off and start it self again, if i remove memory,machine beeps and not turn off. Removed every cable,connectors and pull out board nothing changed. I'm...
  7. M

    820-2936-B - Doesnt turn on

    Hello Everybody Green Light - OK PPBUS_G3H - 12.4V PP3V42_G3H - 3.42V PP5V_S5 - 5V PP5V_S3 - 0V PP5V_S0 - 0V PPVRTC_G3H - 3.3v PP3V3_ENET - 0V ALL_SYS_PWGD - 0v where can i start to check?
  8. M

    820-2850 SMC_PM_G2_EN is fluctuationing

    Hi, Board not turning on, when i check voltage PPBUS_G3H and all main voltage is up and down ( like PPBUS_G3H 8v ~ 12v), SMC_PM_G2_EN is not stable (0,8v ~ 3v) PP3V42_G3H stable 3.4v PP3V3_S5_AVREF_SMC stable 3.3v replaced U7000,U4900 but nothing change, only when i removed SMC_RESET_L pin...
  9. M

    820-3437-B No PPVCC_S0_CPU

    Hello Everybody I'm working on 820-3437-B. Machine came my desk doesn't turn on and not fan spining, when i check board too little corrosion around r7520 . after cleaned fan turns on but not chine and nothing screen. When checked voltage PPVCC_S0_CPU = 0 v CPU_VR_EN = 0.99 v ALL_SYS_PWRGD =...
  10. M

    [SOLVED]820-3115 Keyboard & Trackpad Problem

    Hello Everybody I'm working on liquid damaged around EFI macbook PRO, Cleaned and replaced few resistors and capacitors looking bad . Machine starting with out problem but when loaded OS stop working keyboard and trackpad. For example when i push down alt key when starting machine shows boot...
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