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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