The ZE 4500 /ZE4000 series are a very popular laptop I've seen consistently over the last few years. The three pin design give little support and without having any front support puts a lot of pressure on the back pins, causing it to come loose and break.
This ZE4500 supposedly had to have the ac adapter plug positioned correctly to get the laptop to charge and power on. I wasn't able to get the laptop to power on but when it was torn down I could see the classic burnt voltage pin giving it the wiggle effect to get it to power on.
When I resolder these jack I always use plenty of solder to try to make up for poor design. After the jack was replaced the laptop powered on fine again.
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