Course Content
MST Technician demo class
Basic Troubleshooting Techniques Laptop Troubleshooting: No Power On: Check the power adapter and battery. Testing the power button and motherboard. Use a multimeter to check for faulty power circuits. Overheating: Clean fans and heat sinks. Replace thermal paste. Check cooling system for defects. Display Issues: Inspect the screen cable. Test the motherboard for GPU issues. Keyboard/Trackpad Problems: Check connections, clean dirt, and replace faulty parts. Mobile Troubleshooting: Screen Not Responding: Check the touchscreen digitizer connection. Test for liquid damage. Battery Not Charging: Check the charging port for damage. Test the battery with a multimeter. No Signal/Connectivity Issues: Check antenna connections. Inspect for software or hardware issues (e.g., network IC failure). Audio Issues: Test the microphone and speaker connections. 4. Step-by-Step Demonstration Laptop Repair Demo: Replacing Laptop Battery: Power down the device. Remove the screws and battery compartment cover. Disconnect and replace the battery. Repairing a Cracked Screen: Power down the laptop. Use heat tools to soften the adhesive. Detach and replace the screen. Fixing Overheating: Open the laptop, clean the fans. Reapply thermal paste on the CPU or GPU. Mobile Repair Demo: Replacing a Mobile Screen: Power off the device and use a heat pad to loosen the adhesive. Detach the screen using plastic prying tools. Disconnect the old screen, attach the new one, and seal the device. Replacing a Mobile Battery: Open the back cover or heat the front (if sealed). Disconnect the battery and remove it. Insert a new battery and reassemble the phone. 5. Common Problems and Solutions
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mobile boot sequence
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All BQ series charging ic section Redmi 9A charging problem full circuit diagram
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How To Working Resistor How To Checking Resistor
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MST Technician demo class
About Lesson

The mobile boot sequence refers to the series of steps and processes that occur when a mobile device (smartphone) is powered on, from the moment the power button is pressed to the device being ready for use. Understanding this sequence is important for diagnosing and troubleshooting issues related to booting up a mobile phone.

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