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
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