2 ms·
>With the rear housing off I had access to the power button housing—it’s the white plastic thing at the bottom center of the panel. While the logic board and po
by 1970-01-01 2y ago
>With the rear housing off I had access to the power button housing—it’s the white plastic thing at the bottom center of the panel. While the logic board and power components are covered by a metal box, I must emphasize that even while unplugged it’s still possible to encounter spicy levels of current lurking inside the capacitors in the power supply. Be careful if you try this at home.
This was true when CRTs monitors were around, and also if you're tearing into an old plasma screen. However, the power supply inside a new LED or OLED flat screen monitor will drop straight to zero after just a few seconds.
- fsckboy 2y agojust to be clear, the stray shock potential of a CRT had to do with the flyback circuit for tube itself, not the power supply near the power button/power conditioning.
- 1970-01-01 2y agoFlybacks are deadly when live, however the tube itself was also a massive cap. Sources for those that need it: https://repair.wiki/w/CRT_General_Repairs https://repair.wiki/w/CRT_General_Repairs
- somat 2y agoYou don't see them much any more, but cold cathode backlight lcd panels also have a high voltage section to drive the ccfl's And thank goodness, I like to tear things apart when they break, I am not very good at fixing them but finding the root cause helps me find closure. anyway, nearly every single time an lcd would die in that time period(beginning of lcd flat panels to 2015 or so) I would open it up to find the high voltage control chip smoked.