Electric Shock From Heatsink?
During my early day in Monitor repair there was an old NEC 14″ CRT monitor that came in for repair with the complaint of no power. Since i donot have the original part number i had use a substitution part number. After the replacement of the HOT (not original part number) i wanted to test whether the new substitution HOT would work or not, i used my finger to touch on the heatsink. I did not expect that i would get a shock from the heatsink! My finger developed a sharp pain and it lasted for few hours. Normally by touching on the heatsink or the HOT one would know if the substitution HOT will last long or not.
I began to inspect why the HOT heatsink could have current in it. Later i found that this design actually have the HOT collector (the HOT metal plate body) directly connected to the heatsink. In many Monitors, usually the heatsink is the cold ground. I had learned my lesson from that day onward that do not simply touch any electronic parts in it if you are not really sure of what you are touching.