CRTs can carry a
lethal high voltage charge
even after the computer
is turned off and unplugged.
You could be electrocuted.
eMacs have CRTs (cathode-ray tube) displays. It is dangerous to open up your eMac.
"A CRT can carry a charge even when the display or system is turned off, and can build up a secondary charge after the power is removed.
These areas of a CRT can present a shock hazard:
* Anode cap and connector
* High-voltage cable
* Yoke assembly
* Flyback transformer
* Any exposed soldered connections
Dangerously high voltages flow through these parts until the display is disconnected from its power source and properly discharged. Do not touch any of these parts inside the product housing until after the display is disconnected from its power source and properly discharged." - Safe Working Procedures and General Maintenance < see more at link