camera not working

see

http://support.apple.com/kb/HT2090

Reset SMC or PMU
Reset your computer's SMC or PMU, and then check System Profiler again. (SMC reset instructions for iMac G5 (iSight), Intel-based iMacs; PMU reset instructions for MacBook and MacBook Pro.)

You do not show what mac/operating system you have

if your Mac runs OS X 10.9.x, see http://discussions.apple.com/docs/DOC-6431

grcn_zgr wrote: ... I am afraid is a hardware problem ...

Then Contact Apple Support or an Apple Authorized Service Provider for service.