Shielding question: conductive material near to live circuitry?

Okay, now if I wanted to try opening up the plastic cases of some consumer electronics to place RF and/or magnetic shielding material inside (assumingthere's even space, which I don't know at this time), is there a risk of conductive material being in close proximity to the circuitboards contained within said electronics?

Obviously I wouldn't allow it to touch the internal components, but if there was something conductive in close, maybe very close proximity, would there be a risk of short circuiting/blowing something up?

I'm thinking of either some kind of broad spectrum RF deflecting thin metal, or thin mu-metal type material (I have some that's like a bendable foil versus the traditional stiff mu metal)...or an RF conductive or reflective paint, either that carbon paint, or some nickel (or preferably other, less toxic) metal based paint.

Would there be any other risks involved? Electrical fields from within the electronic devices increased if the material is conductive? Or anything else?

This also leads me to wonder about filtering some of the high frequency noise generated by small color LCD screens: since not much can be done about whatever takes place within the screen itself, is it feasible (assuming there's space within a device's shell) to place a quality ferrite bead on the cable leading from the processing unit to the LCD screen (if there is such acable, as I'm only guessing)?

Thanks for any help, technically minded or knowledgeable folks!

R.  

my thoughts are that to do sheilding peicemeal is a waste of time, unless
you faraday the device it will still leak, especially the LCD screen, with
conductive materials there is every chance that you can end up cnducting the
rf more by creating a re-radiating transmitter surface, my experience with
dirty power tells me that you will find it problematice to sheild khz
frequencies unless you have a large air gap between the offending electronics
and the sheild plus you would probably have to do multi pass/stage sheilding
to really dilute the energy paths. Earthingdraining and absorbing would be
good in addition to sheilding but again to do a good job for a sensitive
you would need to be very thorough indeed, cross all the i`s and dot all the
T`s three times over. It probably better to find a screen, mouse,
keyboard, pc etc that you can tolereate the most and then remediate.

paul uk


[Non-text portions of this message have been removed]