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原帖由: Terry ,

标题:

help for reverse voltaged system.

文本:

Hi All, my first post here.

The long story is this,  my grand neice (14) borrowed my laptop  to do some homework, she hadnt finished by the time she went home so she took it with her, the brick charger died so she returned it with another charger plus the original,  she told me the charger had “smoked” around 10 pm so she ran it on battery for a couple of hours. new charger was the same voltage and current so i plugged it in to recharge it, idiot me didnt check the polarity. and of course when i plugged in it promptly blew the protection circuit.

i know the rest of the system still functions as i ran it on battery for 10 minutes till it automatically shut down with low battery warning.

i am 66 years old and have been into electronics/computers and radio for over 40 years.i can replace what needs replacing BUT, to do this i need a circuit diagram to get some idea of where to find what needs replacing. PLEASE can anyone help?

设备:

Asus Laptop F553M

状态:

open