Not recommended for casual observation. If you disassemble it, first ground yourself electrically to bleed off any static charge from your body.
Remove four screws from the front cover, then slide the board assembly out. There are some metal tabs on the shield surround that lock the top and bottom shields in position. Twist the tabs to release the top shield, then pry the shield off. Don't forget to bend the tabs back when you re-install the shield.
The notch in the PROM goes to the left, as viewed here.
