having laptop camera dell inspiron 1545 is not working..

And you know this, how? Are you sure it is not a software problem?

Is the right driver for it installed?

Any other specification of the problem ?

About my opinion you did not install the proper driver for the webcam of your dell laptop. Please install the proper and updated driver for the webcam of your laptop. if the problem is not fixed after the installation of the driver then there is a problem in web-cam. Then you need to go to authorized service centre for proper troubleshooting.