my webcam is not detectable and it's not listed under the device manager's dropdown list my laptop model number SVF14213SAB

[beeraatnepal1]

how to install the webcam in sony vaio SVF14213SAB?

 

[hang-the-9]

If Device Manager does not show it even in hidden devices, then it may just be bad. Did you check the BIOS to see if it maybe disabled there? You can get a USB one pretty cheap.