PM SLP S4 L Timing
Apple Mac Logic Board PM_SLP_S4_L Signal Timing and Voltage This article is for MacBook logic board component-level repair professionals, written by IT-Tech Online, the Mac repair specialist in Melbourne, Australia. We will discuss the PM_SLP_S4_L missing issue in great detail. Previous article: MacBook SMC Circuit and PPBUS_G3H voltage adjustment Next article:MacBook logic board power rails […]
Why Apple Service Centres Won’t Fix Your Logic Board
Have you ever visited an Apple authorised service centre just to be told your MacBook is unfixable? It happens quite frequently, and this is because the MacBook’s logic board is faulty. This page will explain why Apple authorised service centres cannot fix faulty logic boards and about Apple centre logic board repair. Mac Repairs Dependence […]
Spilled water on MacBook? Here’s what to do
IT-Tech Online Spilled water on MacBook? Here’s what to do Get a Free Quote Your MacBook has encountered a common mishap – water spillage, leading to unresponsive keyboard and trackpad, and even an automatic shutdown. What to do now? Spilled water on MacBook is a very common Mac disaster. Don’t worry. Follow this step-by-step guide […]
How does My Macbook Power up
How does my MacBook power on? 1. Once you connect MagSafe power adapter to the Mac, the System Management Controller (SMC) will talk to the chip on the MagSafe and the green light turns on. 2. The charging circuit receives power from the Magsafe and starts charging the battery if it is not fully charged […]
How does Macbook Power on
How does a MacBook power on? (For computer technicians) 1. An always-on PP3V42_G3H 3.42V power rail is created directly from an internal battery or a charger. This power rail powers the System Management Controller (SMC). The Mac is in “off mode” (G3) but the SMC keeps scanning the keyboard power-on button and Magsafe connector for […]
Macbook Power on Sequences
This article is for MacBook logic board component-level repair professionals, written by IT-Tech Online, the MacBook repair specialist in Melbourne, Australia. Next article: MacBook SMC Circuits and PPBUS_G3H voltage adjustment. We will discuss the early stage of MacBook power-on sequences here. It covers the creation of PP3V42_G3H and PPBUS_G3H power rails and their normal voltages. At this […]
MacBook Pro graphics issues and their causes
This article is for MacBook logic board component-level repair professionals, written by IT-Tech Online, the MacBook repair specialist in Melbourne, Australia. Faulty GPUs are the main cause of graphics issues. This is especially true for the MacBook Pro 2011 A1286 AMD graphics chip. For other MacBook models, this may not be the case. Any of […]
iMac 27″ 2013 SSD upgrade
The owner did a RAM DIY upgrade from 8 GB to 16 GB with hardly noticed improvement. So he decides to upgrade the hard drive. With a Samsung 1TB SSD drive installed, the OS startup time is cut from 141 seconds to 17 seconds. Massive performance improvements! Share this: Recent Articles Get a Free Quote
Apple iMac Repairs | 27″ iMac 2011 graphics card replacement
27″ iMacs 2009-2011 are still very popular nowadays due to the capability, reliability and equipped with the world’s best LCD screen of the year. Unlike their little brother MacBooks where the GPUs are soldered on the logic board, the GPUs in these iMac models are soldered on the daughter boards and plugged into the standard […]
How to recover data from a dead MacBook Pro A1707 with touch bar?
You have accumulated lots of photos, documents, and videos on your Mac hard drive for years. Your Mac suddenly won’t start up or won’t turn on today and you don’t have a data backup on iCloud or Time Machine (macOS). What to do now? Data loss is a heartbreaking issue. However, Mac hard drive data […]
