@hamishthes43200 you are telling us that you changed the replacing the AC adapter and the DC-in power jack but not if you replaced the battery. That would actually be my first step. Measure the voltage on the battery connector. First with the AC adapter unplugged, then plug your AC adapter in and measure again. Your voltage on the connector should increaser to about the voltage that your adapter supplies. Let us know what you find.
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@hamishsquirrel you are telling us that you changed the replacing the AC adapter and the DC-in power jack but not if you replaced the battery. That would actually be my first step. Measure the voltage on the battery connector. First with the AC adapter unplugged, then plug your AC adapter in and measure again. Your voltage on the connector should increaser to about the voltage that your adapter supplies. Let us know what you find.
@hamishthes43200 you are telling us that you changed the replacing the AC adapter and the DC-in power jack but not if you replaced the battery. That would actually be my first step. Measure the voltage on the battery connector. First with the AC adapter unplugged, then plug your AC adapter in and measure again. Your voltage on the connector should increaser to about the voltage that your adapter supplies. Let us know what you find.