While troubleshooting why an older LCD TV (Viewsonic N3751w) wouldn't turn on, I noticed several capacitors on the power board were swollen. Through my friend Google, I found that on this particular power supply (FSP271-5F01), it was common for the capacitors to go bad. I found a replacement kit, ordered it, and replaced the bad capacitors. However, the TV still did not turn on.
Now here is the part I need help with, and I'm hoping this is the correct forum to ask the question in. While troubleshooting further, with the TV plugged in, I touched the voltage regulator heat-sink to see if there was heat being produced, and received a shock. Not a minor one, but a pretty decent, better than a shot of espresso type shock. I happened to be touching the metal frame at the same time.
I measured the voltage at 86v AC +/-. I measured the voltage in AC because the shock had the back and forth feel of an AC shock, versus the continuous muscle spasm of a DC shock. I am fairly certain there shouldn't be this kind of voltage present here, but as I only have a limited knowledge of circuit boards, was wondering if this is normal, and if not, where should I be looking for the bad component?
Included is a picture I downloaded of the power supply. The red ovals indicate the areas where I get the voltage readings. There is a cover that connects the two heat-sinks. 
Best Answer
The whole thing is inside an enclosure, so the end user isn't supposed to touch the heat sink...
Sure, the manufacturer could have added some insulating silpad between the metal back of the power devices (which is connected to some voltage which will shock you) and the heatsink but...
It would have cost 5 cents extra!
Can't have that. Also, omitting the insulator gives better thermal transfer which results in a smaller heatsink. Thus it saves more than a few cents...
If there are 3 devices and they need to be insulated from each other, then you only need 2 silpads... and the third device just gets grease and makes the heat sink live.