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1namylnFlag for United States of America

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Why did my Dell D420 battery stopped working?

The battery in my Dell D420 shows no charge when the battery LED indicator is pressed.  Additionally the battery light blinks orange 4 times then green and the sequence repeats.  This didn't happen until I removed the battery this morning to look at the hard drive.  Once I reinserted the battery these problems began.  Just last night this battery was working fine holding a charge for almost 3 hours.  

I upgraded the memory from 1GB to 2GB.  Can't see how this could affect anything but I want to mention it just in case.

Thanks in advance.
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Thanks.  I'm familiar with Dell's maximum spec.  However, the system recognizes all 2.5GB and runs quite well.  I switched the RAM back to no avail.  
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Dan Muzrall
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