The best way to do this is to undo the screws that hold the screen caseing together, using a butter knife very gentle prize the case apart, usually this very easy to do, at the top you will see the housing for the WebCam, gentle take the WebCam out, usually they are clipped in but some have small screws to hold it in place, when you have the WebCam free look at the board and locate the L.E.D. Now you have 2 options de-solder the first pin on the L.E.D. and bend away from the contact thus rendering it bypassed or you could simply cut it off entirely if you do not intend on reconnecting it later, beware that sometimes the L.E.D. is part of the circuit, if this is so when you disconnect 1 pin of the L.E.D. the WebCam will not function to solve this simply remove the L.E.D. and replace with a "Jumper" to connect the circuit and bingo WebCam working again, this is what I did on my Toshiba Sat Pro and it works perfect with no blue light... This is not a fix for the novice user.