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install yahoo messanger or some webcam software which your laptop support install it and check

HP Compaq 6510b PC Notebook

HP Notebook PCs - Overview of Recovering the OS or Reinstalling the Operating System (instructions to do every type of recovery on any operating sys.): http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=115&prodSeriesId=3355650&prodTypeId=321957&prodSeriesId=3355650&objectID=c00006110

Resources for HP Compaq 6510b Notebook PC (all info including the manual, drivers, guides, for your comp): http://h20000.www2.hp.com/bizsupport/TechSupport/Home.jsp?lang=en&cc=us&prodTypeId=321957&prodSeriesId=3355650&exit=product_series_oid&jumpid=reg_r1002_usen_s-001_title_r0001&lang=en&cc=us

all info from a search for 6510b on hp.com

try this: Make sure the battery for the notebook is out in step 8


the procedure to reset the CMOS/BIOS is in the maintenance and service guide on page 46.

Follow these steps to clear the password:
NOTE: These steps also clear CMOS.
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and
then unplugging the AC adapter from the computer.
4. Remove the battery (see Battery on page 48).
5. Remove the real-time clock (RTC) battery (see RTC battery on page 68).
6. Wait approximately 30 minutes.
7. Replace the RTC battery and reassemble the computer.
8. Connect AC power to the computer. Do not reinsert any batteries at this time.
9. Turn on the computer.
All passwords and all CMOS settings have been cleared.

Does the other laptop's battery work in the one that was hanging? If so, switch batteries.

Your Battery is basically dead. They only have a useful life then have to be replaced. Yours is at the end of it's useful life.

try re installing the bluetooth devices driver

Do you mean HP Compaq 6510b ?? its a Notebook

IF the battery is bad the charge lndicator on the laptop will flash (But not periodically) it will be a constant on-off-on-off..... Best check would be to remove the battery completely and use the adapter/charger power supply only. If it still does not turn on then you either have a bad power jack connection or a more serious motherboard problem. Also is the green light flashing on the adapter/charger or is it the charge/battery indicator on the laptop?

Remove the cmos battery from the motherboard for about 5 seconds, replace & reboot. Hope this helps & please remember to rate my answer. Thanks.

please look at this
you can count the pin number on your laptop and buy the correct one..
hope it helps!