REPAIR TUTORIAL MacBook Power On Sequences: PPBUS_GH3 voltage By Learnallfix October 30, 2021 0 1. PP3V42_G3H power rail creation.The always-on 3.42V power rail PP3V42_G3H can be created directly from an internal battery or Magsafe charger.The MacBook Battery power goes through R7006, D7005 to U7090… Read more
REPAIR TUTORIAL MacBook logic board power rails and all system powergood By Learnallfix October 30, 2021 0 Apple logic board S3 power rails creation 1. The U0500 CPU/PCH outputs PM_SLP_S5_L control signal to inform the SMC (System Management Controller) that the MacBook power state transition will begin.2. … Read more
REPAIR TUTORIAL How to fix MacBook battery not charging issue By Learnallfix October 25, 2021 0 1. What is MacBook battery not charging issue?A MacBook battery not charging problem means that you can turn on your MacBook, but the charger will not charge the battery. In… Read more
REPAIR TUTORIAL MacBook Pro Graphics Issues and their causes By Learnallfix October 25, 2021 0 The GPU is the Graphics Processing Unit. It is responsible for video output on the screen. If it is faulty, you will see all sorts of the abnormal video display… Read more
REPAIR TUTORIAL How to fix spilled water on a MacBook Air or MacBook Pro By Learnallfix October 25, 2021 0 You spilled water on a MacBook Air/Pro and it turned off almost instantly. What to do now? Follow the instructions of this guide to minimize the liquid damage and increase… Read more
REPAIR TUTORIAL How to fix iMac not powering on By Learnallfix October 13, 2021 0 When you press the power button, your iMac won’t turn on. Your iMac has a black screen. What to do now? Don’t worry! We’ll run through various checks, tips and… Read more
REPAIR TUTORIAL How Southbridge and Northbridge works on motherboard By Learnallfix October 11, 2021 0 The Southbridge is an integrated circuit on the motherboard that is responsible for the hard drive controller, I/O controller and integrated hardware such as sound card, video card if present… Read more
REPAIR TUTORIAL How to read laptop schematics By Learnallfix October 6, 2021 0 The purpose of electronic circuits is to control the flow of electric currents, it has been found experimentally that the intensity of various electrical effects is related to the amount… Read more
REPAIR TUTORIAL Laptop motherboard power-on switching process By Learnallfix October 2, 2021 0 Laptop motherboard power requirements in order to switch on first are the availability of 3V and 5VALW. As a technician you have to be careful when finding 5VALW missing. Switched… Read more