===CRT TV===
* Power supply capacitors store hundreds of volts even when unplugged.
This voltage is distributed around some parts of the circuit board.
* EHT supply, stored by the picture tube when off
* Focus voltage, also stored
* Propped appliance can fall on child or pet
* Picture tube may explode if the unprotected thin rear of the tube is
broken

We used to dispose of lots of 'gassy' tubes by tapping the thin rear
nipple on the tube with a long screwdriver. Never had one explode. The
cautious among us used to cover it with bubble wrap - which used to
get sucked inside!