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
REPAIR TUTORIAL Laptop motherboard code and abbreviations By Learnallfix September 29, 2021 0 C :CAPACITORD :DIODEF :FUSEL :INDUCTORPC :POWER CAPACITORPD :POWER DIODES/DIODEPL :POWER INDUCTORPQ :POWER TRANSISTORPR :POWER RESISTORPU :POWER INTEGRATED CIRCUITQ :TRANSISTORR :RESISTORT : TransformersU :INTEGRATED CIRCUIT/BGA CHIP/EMBEDDED CONTROLER/BIOS IC,ETCX : Terminal strips,… Read more
REPAIR TUTORIAL Laptop motherboaed sleep states(S0-S5) By Learnallfix September 28, 2021 0 VS to Device (Lcd / led, hdd, optical, usb, wifi, bloutooth, keyboard, sound, camera etc.) For details on each Rail Voltage VS can be seen on the schema and Datasheet… Read more
REPAIR TUTORIAL How To Check No Display Problem On Circuit By Learnallfix September 28, 2021 0 Quick Checks1.Take of all non onboard device : processor , memory / SODIM , bloutooht , webcam , modem , wifi , card reader etc.2.Check and test processor/SODIM, then switch… Read more
REPAIR TUTORIAL How To Check 3v_5v(Rt8206b) System On Laptop Motherboard By Learnallfix September 23, 2021 0 Laptop Motherboard needs 3V and 5V to power up. This 3V_ALW supply gives power to VSB (voltage switch button), EC Bios IC-EC (embedded controller), SB(South bridge) and more other important… Read more
REPAIR TUTORIAL Understanding Laptop Power Sequence By Learnallfix September 23, 2021 0 1.VALW / Power Always or main dc power supplyPower used in the circuit is usually dc consisting of 19V, 3.3. but there are also 15V - 20V adapter range voltage… Read more
REPAIR TUTORIAL How to check Tps 51125 regulator ic By Learnallfix June 24, 2021 0 This is a used main regulator in Laptop. This guide will help you identify if this ic needs replacement.Tps51125 should have the following voltage reading for normal operation:Ensure you getting … Read more