For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.
Subscribe Now

Recent content by 2informaticos

820-02020 stuck on 5V 0.03A

U5700 gets enable signal from U7000, via U5340.
- 2informaticos
- Post #8
- Monday at 11:41 PM
- Forum: Macbook Logic Board Repair Questions
820-02020 stuck on 5V 0.03A

If overheats, U5700 is probably dead now.
- 2informaticos
- Post #6
- Monday at 10:13 PM
- Forum: Macbook Logic Board Repair Questions
820-01958 20v, backlight, no image

Is it recognized in DFU mode?
- 2informaticos
- Post #2
- Monday at 10:12 PM
- Forum: Macbook Logic Board Repair Questions
820-02016 A2337 - Battery not detect

Check SYS_DETECT and SYS_DETECT_L levels with battery and charger both connected.
- 2informaticos
- Post #2
- Monday at 8:34 PM
- Forum: Macbook Logic Board Repair Questions
820-02020 stuck on 5V 0.03A

R5710 has 0V on both pins?
- 2informaticos
- Post #4
- Monday at 7:19 PM
- Forum: Macbook Logic Board Repair Questions
820-01958 boot into internet recovery only

Machine should go in recovery when doesn't detect internal macOS. Check if goes to target disk mode.
- 2informaticos
- Post #2
- Monday at 11:47 AM
- Forum: Macbook Logic Board Repair Questions
820-02020 stuck on 5V 0.03A

3V8_AON must come on. DFU requires some voltages derived from 3V8_AON. Check U5700's basic voltages: pins 8, 6, 7, 5, 12.
- 2informaticos
- Post #2
- Monday at 11:44 AM
- Forum: Macbook Logic Board Repair Questions
820-02841 - Keyboard and shutdown issues after liquid damage

Replace QD520.
- 2informaticos
- Post #11
- Friday at 9:36 AM
- Forum: Macbook Logic Board Repair Questions
820-02020 runs on battery, doesnt charge

Check all power rails from the area; including TBT controller.
- 2informaticos
- Post #8
- Thursday at 5:37 PM
- Forum: Macbook Logic Board Repair Questions
820-02841 - Keyboard and shutdown issues after liquid damage

I expect voltage readings around QD520. High value resistors can't be checked in ohm scale onboard.
- 2informaticos
- Post #9
- Thursday at 5:36 PM
- Forum: Macbook Logic Board Repair Questions
820-02841 - Keyboard and shutdown issues after liquid damage

Do you get correct PBUS_VSENSE signal now? If not, inspect QD520 and adjacent components.
- 2informaticos
- Post #7
- Jul 2, 2025
- Forum: Macbook Logic Board Repair Questions
A2681 Water damage, trackpad works but no haptic feedback, keyboard not working.

Trackpad click works, just no feedback? Keyboard problem shouldn't be related with trackpad feedback.
- 2informaticos
- Post #7
- Jul 2, 2025
- Forum: Macbook Logic Board Repair Questions
820-00923 don't start whit battery

Check if starts in SMC bypass mode. Be sure to connect battery data cable in correct orientation.
- 2informaticos
- Post #4
- Jul 2, 2025
- Forum: Macbook Logic Board Repair Questions
820-02020 runs on battery, doesnt charge

Then you have problems on USB-C area. You should try to replace CD3217 chips; one by one anyway.
- 2informaticos
- Post #6
- Jul 2, 2025
- Forum: Macbook Logic Board Repair Questions
820-02020 runs on battery, doesnt charge

When running on battery, can you get access to USB devices?
- 2informaticos
- Post #4
- Jul 2, 2025
- Forum: Macbook Logic Board Repair Questions

Top