Try disconnecting the power supply and start it on battery only.
After you see a screen display of some kind, the power supply can be reconnected.
If this does not work, then remove the battery and start the computer using the power supply only.
After the computer start up sequence is complete, the battery can be re-inserted into the computer.
If the computer continues to misbehave on later restarts, then follow the more rigorous BATTERY RECALIBRATION Procedure below.
1. Now, after the system is up and running with both the battery inside and the power supply connected, after taking note of the current settings so that they can be restored later, set the power plan to High Perfomance, set the computer to Never Sleep on Battery and on Power Supply, disconnect the power supply and allow the computer to run until it shuts itself off due to a low battery condition. This will discharge the battery and performs phase one of battery re-calibration.
2. Next, plug in the power supply, while leaving the battery in place and restart the computer. Allow the battery to fully recharge while leaving the power plan at High Performance and the Sleep to Never. This performs phase two of battery re-calibration.
3. Then, disconnect the power supply and allow the computer to run until it shuts itself off due to a low battery condition, again, now that it has a possibly better, fuller charge than in the previous charge/discharge cycle.
4. Again, restart the computer, connect the power supply and allow it to completely charge the battery.
5. Shut down the computer, disconnect the power supply.
6. Restart the computer and allow the computer to run until it shuts itself off due to a low battery condition again.
7. Now the battery has been recalibrated. Connect the power supply, restart/resume the computer and allow the battery to fully charge again. The Power Plan and Sleep Mode can be set back to their original settings at this time.
8. The above procedure should only need to be performed every six to twelve months to recalibrate the battery.
This condition sometimes happens to my HP Presario when I have left the power supply plugged into the computer with the battery in for several days or weeks at a time, without running on the battery alone for a while to discharge and recharge it a little bit.
HP recommends that when running your computer for more than two weeks from the power supply, the battery should be removed to slow the aging of the battery, which can cause the battery to lose capacity or fail prematurely.
May 23, 2011 |
HEWLETT-PACKARD Hewlett Packard HP 15.6"...