This sony 7H1L came in like lots of sony laptops I see with the physically broken dc jack. The 71HL laptops use a cable dc jack that plugs into the motherboard. I buy a dc jack and de-solder the old broken jack off the cable and solder a new one on for this model.
This laptops dc jack had two little wires sticking out of the middle of the jack due to the plastic breaking. You can usually hold the ac adapter plug in just the right way to get the laptop to power on.
Installing a new dc jack is a success and the laptop powers up and charges the battery.
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