When I first scrapped out several tons of old computers, all i knew was the main boards had to be removed as being toxic waste. At the same time I also spent a great deal of energy removing most all the plastic covers etc. I had probly the cleanest computer cases they'd ever seen, and a huge pile of plastic, which I near never was able to get rid of! If i'd only left it in place, it would have made no difference to the yard, and would have saved me a great deal of time, energy, and cusswords