Switch on a Tecra A2 laptop is the button that communicates when to turn off the screen when you close the laptop lid. A dirty close switch might get stuck inside the laptop and interrupt power supply from the inverter board. If your screen remains blank when the laptop is open, you might have a jammed close switch.
1). Use your index finger to press down on the close switch. Apply force to unstick a sticky close switch.
2). Dislodge dirt and debris with a pair of tweezers. Maneuver the tweezers around the close switch to remove buildup.
3). Spray the base of the close switch with compressed air. The burst of air may dislodge debris that couldn't be removed by tweezers.
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