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HP ProBook 6555b won't wake up from sleep

Put my laptop to sleep.  In the morning, it wouldn't wake back up.  Previously that week, I had an warning message saying that there was a problem with the battery indicating it wasn't charging even though it was plugged in.  So, I figured that my battery may need to be replaced.  But it wouldn't wake-up even when it was plugged in.  Now, the caps lock and num lock led lights flash 3 times in a row and it does that 5 times, then shuts itself back off after a few minutes.  HP site said flashing 3 times was a module error.  But following their suggestions did nothing.  Thinking the motherboard is gone.  Any chance this is something more simple?


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