Lenovo IdeaPad Gaming 3 (15ARH05) Power Button Not Working After C-Cov

Hi @thomas91919,

Have you proved if the button is working OK electrically when it is operated?

Can you access the button terminals at all?

If so disconnect the battery from the motherboard and then check if there's a short circuit across pins 2 & 4 (or 1 & 3) when the button is operated.

If the button works OK electrically, here's the schematic that will help.

Go to p.50 (of 58) to find the On/Off switch and go from there.

Here's the hardware maintenance manual that will also help with the disassembly if you need to remove the motherboard etc.

Hi @thomas91919

It's a tactile switch and it does look like the top part of it is missing.

It is a Diptronics T3BL-03-Q-T/R and they're available from here

Here's the datasheet for the switch and here's a zoomed in image (sorry about the blurred image) that shows what it looks like.

It looks like it is soldered onto pads on the motherboard, one in each corner, so you may be able to remove/replace using a hot air gun perhaps.

Note the arrowhead on the board. That denotes the location of pin 1 of the switch.

According to the schematic pins 1&3 are connected to each other (tracks on the board under the switch) and connect to D1 and pins 2&4 are connected together and go to earth. Make sure that when you insert the switch that it's in the right way so that when you operate it there a short circuit between pins 1&2 (and also 3&4-) - see the image on the right showing the switch on your board where I've marked the pins. Use an Ohmmeter to prove it. If you connect the switch 90° either way it won't work. It has to be orientated the correct way. Hopefully there is a mark on the switch to denote pin 1 that you can line up with the arrowhead on the board.

(click on image)