lauantai 21. marraskuuta 2020

Lenovo Yoga 720 power buttons

Lenovo Yoga is my favorite laptop. Today I performed a power button removal for 720 13". The power button had resigned months ago and I have started up the machine with Novo button from the other side of the computer. Now Novo button also broke. I could not start up the computer by original means. So I put my electronics pants on and opened the gadget. As usual opening of the computer was the hardest part. I had good guide from here.



I had found a loose part. The power button was only attached to the motherboard with a one leg. Novo button was shattered to three pieces. I decided to get rid of both of the buttons as the power button was without one of it's legs. After the assembly I powered up with a screwdriver. The old jumper start up worked but only from the keyboard side of the motherboard. I had to leave two screws unscrewed and bend the motherboard and stuck the screwdriver on the leads of the unattached power button. Now I had the powers back on and decided head to BIOS to enable Thunderbolt start up. I hope this will enable to start up the machine with the thunderbolt power cord plugged in. I also made sure that the computer will only sleep with the lid closed and doesn't shut down when unused from Settings>System>Power & Sleep.

Computer, tablet and phone buttons should be pushed gently as they are attached only with the solder to the PCB. Here are few pics that I took with an optical microscope from the power buttons.




And of course the working computer...



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