The close switch on a laptop lid is what instructs the screen to turn off when the laptop is closed. Some older laptops, including Toshiba models, use mechanical switches that are operated by a retractable pin. A jammed switch can result in the screen remaining dark even when the lid is open. If the pin on the switch is broken off, you will need to send your laptop back to the manufacturer for repair, or take it to a computer repair specialist. Additionally, many newer Toshiba models use magnetic switches. If you are having problems with a magnetic switch, you will also need to contact the manufacturer.
Open the laptop lid and locate the close switch. Toshiba laptop switches can typically be found near the lid hinges.
Press gently down on the switch pin a few times. Often, a bit of nudging may be all it takes to get the pin to snap back into action. If this does not solve the problem, continue to Step 3.
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Examine the switch to look for any debris or other foreign objects that may be stuck. Use the penlight to look around the edges of the frame. Use the tweezers to carefully remove any visible objects.
Use the compressed air canister to blow away any remaining dust and debris. Tap on the switch pin again to make sure that it moves freely.