Laptop hp Compaq 6530b alerting battery code error 601

the old error codes
did you update bios?
see the hp.com service manual, tells this.

https://duckduckgo.com/?q=hp+ERROR+501&ia=web

The error message refers to the battery on the bottom of the notebook that powers it when it's not connected to A/C power. If you go into the F2 at startup or use HP Support Assistant, you can run a comprehensive battery test

Should be a touch button switch looks like a Radar icon between the screen and function keys

make sure your cam is not damaged download driver from the link given
HP Compaq 6530b drivers for Windows 7
Or
http://www.driversforfree.com/omn_ofm_omd_dt_drd/hp/hp-compaq-notebook/6530b/webcam/hp-webcam-driver/search.aspx

You cannot bypass BIOS password

Remove the main battery and run the ac adapter only, if everything works fine the battery will need to be replaced, if the computer continues to shutdown the problem is most likely a bad cooling fan or it needs to be taken apart and given a good cleaning.

he HP Compaq 6530 laptop series is the latest from HP Compaq.There are four new laptops in the HP Compaq 6530 series.Each of these have 14.1-inch WXGA display (1280×800).They are namely HP Compaq 6530b, HP Compaq 6535b, HP Compaq 6530s, and HP Compaq 6535s.
The b series are business series laptop which focus on mibility and the s series laptops are the enhanced security series which have added security features.
The b series laptops (HP Compaq 6530b and HP Compaq 6535b) has the intel mobile processors with Intel Mobile chipset whereas the s series laptops (HP Compaq 6530s and HP Compaq 6535s) has the AMD mobile processor with AMD M780G chipset.