Laptops forum


Laptop does not show that AC power adapter is attached

by mikeb1960 / December 20, 2011 1:03 PM PST

I have a Gateway nv5378u. Today it suddenly beeped to indicate that AC power had been disconnected, while it was still plugged in. Now it does not recognize that it is plugged in and will run on battery power only. When plugged in, the indicator light on the AC power adapter brick dims, and pulses, but returns to normal when unplugged from the laptop. Is this an adapter, battery, power connection, or motherboard problem? And how do i fix it? I've already done a power reset, and tried a different power outlet.

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All Answers

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There are a few causes.
by R. Proffitt Forum moderator / December 20, 2011 1:05 PM PST

One is the usual LAPTOP JACK ISSUE. It's so prevalent that you can find businesses on the net that do just this one repair.

We also have dead adapters. But this is usually easy to test. The first test is with the Volt meter. Can't use that test? Replace the adapter and hope.

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NOt sure
by th3m4nII / December 24, 2011 2:18 AM PST

Not quite sure about the problem, so many fail points. Try testing the adaptor on someone elses laptop. If that fails (believe me, almost noone has gateway laptops) replace the AC adapter. Mine failed a few years back, so I'd think that the adapters aren't very long'lasting.

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