The other day I was checking the heat coming off an aluminium heatsink on the power PCB of an eizo EV line led display monitor. It was okay, not too hot, just warm and tad bit hot. When I touched this it was okay. The display for my custom project was on and still works perfectly. Then I touched the aluminium bezel of the monitor and that was okay too.
BUT... when I touched with both handes BOTH the lcd panel's aluminium back (to check if the led backlighting was warm) with one hand AND the aluminium heatsink on the power board of the monitor with my other hand, I got a huuuuge electric continuous shock for a full second. Boy it hurt! I've had a few times in my life touched live wire accedentally while fixing lightbulbs etc, but this time it was long and Im lucky to still be here telling the tale. This seemed or felt more dangerous / higher voltage! How can that be I thought LED was cute and safe!!
How can I insulate the tiny aluminium heatsink on the power pcb of the monitor?
I am planning on covering these PCBs with an aluminium cover as a ground encasing for protectingmyself and children, so first I must insulate this PCB and make sure no heatsinks touch the aluminium plate covering it. HOW can one insulate a Power PCB?
Can I pot the power PCB and the monitor PCB completey submerge it with hot glue or with epoxy resin for example? Or could I just cover the pcb with a rubber layer? All suggestions will count as answers as not only I appreciate your input, it (your answer) might in some cases even save lives! So, thanks in advance!