crwdns2935425:03crwdne2935425:0
crwdns2931653:03crwdne2931653:0

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Cut the part of the ticket that is out of the chassis.
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Now with a paper clip tests if it works.
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If it works remount the back cover. If i doesn't work probably the problem is the button and not the contact and you need to replace it.
crwdns2944171:0crwdnd2944171:0crwdnd2944171:0crwdnd2944171:0crwdne2944171:0