Here is a link to the [http://www.s-manuals.com/notebook/dell_inspiron_7720|schematics] for your laptop (I think).
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If you can follow circuit diagrams, hopefully it will allow you to do some rudimentary testing of the power input circuits to perhaps find the cause of your problem.
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If you can follow circuit diagrams, hopefully it will allow you to do some rudimentary testing of the power circuits of both the AC input and the battery, to perhaps find the cause of your problem.
Hi,
Here is a link to the [http://www.s-manuals.com/notebook/dell_inspiron_7720|schematics] for your laptop (I think).
If you can follow circuit diagrams, hopefully it will allow you to do some rudimentary testing of the power input circuits to perhaps find the cause of your problem.