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There are a couple of possible reasons.
First, though, Try pressing and holding the power button down for ten seconds.
This will eliminate the possibility of a hibernation issue.
Pull the battery, replace it.
The most likely reason for this is that the battery is dead for good, or there is a problem with the power systems on the mother board.
When you first start up your laptop, it tries to pull a small amount of power from the battery, even if it is plugged in.
If the battery is dead completely and cannot accept a charge, you will get this result.
I ordered a battery thinking it was the problem, but I'm ot sure. This is my wifes computer and she put it to sleep earlier. When she tried to log onto it later the black screen.
In that case, your best bet would be to contact the manufacturer to arrange for repair or replacement.
She has had battery problems before slowly losing percentage of charge over time. I just took a shot in the dark with the battery purchase
I think that is your best bet.
I appreciate this. I'll try them then. Thanks