REPAIR TUTORIAL How to check Laptop Charging circuit By Learnallfix December 4, 2021 0 Battery voltageLaptops battery packs are based around lithium cells.These are either Li-ion cells, round cylinder similar to your alkaline battery but in a 18650 package, or LiPo cells, flat rectangular… Read more
REPAIR TUTORIAL Time CPU or PCH shoots out the PM_SLP_S4_L signal By Learnallfix November 2, 2021 0 This question burdens a lot of component level repair technicians. This article discusses the prerequisites that must be met before the Intel CPU/PCH outputs PM_SLP_S4_L. In order to understand the… Read more
REPAIR TUTORIAL MacBook SMC Circuit and PPBUS_G3H By Learnallfix November 2, 2021 0 System Management Controller (SMC) is a programmable chip containing Apple computer management codes. We will use the MacBook Air 13” 2015-2017 logic board schematics 820-00165 as references.Every Apple computer model… Read more
REPAIR TUTORIAL Laptop Voltage Requirement and Power Supply diagram (VALW section of ADP+,+3V,+5V) By Learnallfix November 2, 2021 2 Laptop Power Supply and Voltage Requirement (VALW section of ADP+,+3V,+5V) .Bios is a firmware that runs the Southbridge whose main function is to run the LPC Bus interface.The storage capacity… Read more
REPAIR TUTORIAL How to fix macbook question mark folder By Learnallfix November 1, 2021 0 What is Mac question mark folder?When you switch on a Mac, instead of displaying the Apple logo, your Mac screen shows a mac flashing folder question mark in the centre.… Read more
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