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8352
May 23rd, 2009 19:00
AC adapter green light keeps going out
I have an XPS M140 laptop. I bought it in the US, but am now living in New Zealand, which has 220V power.
I operate the computer pretty much solely on AC power, but have begun having a problem with the AC adapter recently. Occasionally, even when the computer is plugged in, the battery icon shows that I'm operating on battery power. When this happens, I notice the green light on the ac adapter is off. I discovered that if I unplug the cord then plug it in again, the light goes on and all is well...for a while, anywhere from one to seven days.
Once I have unplugged/re-plugged, the battery charges up just fine and I can use the AC until the next time it happens.
I have searched various forums and knowledge bases to no avail. Anyone have any ideas about what might be going on?
LONG TOM
ejn63
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May 23rd, 2009 20:00
If the LED goes out when the adapter is not plugged into the notebook, the adapter is failing and should be replaced.
If the LED is on all the time when the adapter is plugged into the wall but NOT the notebook, but the LED then goes out when you plug in the notebook end, it's the mainboard in the notebook that is failing.
Long Tom
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May 23rd, 2009 21:00
enj63,
The light stays on when the adapter is plugged into the wall, but unplugged from the computer AND stays on when I plug the adapter cord into the computer. It only goes out now-and-then while the computer is running on AC.
It may be happening when the computer is asleep or in hibernate mode. I've never witnessed it happening. I've only notice it when I happen to notice the battery icon is visible, indicating that I'm on battery power.
Unplugging the adapter from the wall and plugging it back in turns the light back on...sometimes for several days before it happens again.
Does this sound like a motherboard problem?
LONG TOM
ejn63
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May 24th, 2009 04:00
It could still be an adapter problem - try that first. At about $35-40, it's a lot cheaper than replacing the mainboard ($350-400+).