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Dangers of opening up a monitor

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Dankim000

Junior Member

I've recently received a really nice viewsonic monitor. Problem is, the vertical oscillator is shot and needs to be replaced. I've read monitors hold a lot of charge even after being unplugged for days. Warnings found on manufacture websites like these are a bit daunting:

"For TVs and monitors in particular, there is the additional danger of CRT implosion - take care not to bang the CRT envelope with your tools. An implosion will scatter shards of glass at high velocity in every direction. There are several tons of force attempting to crush the typical CRT."

"As CRTs hold charge well after being unplugged, lethal shock is very possible. Use extreme caution."

The question is, does anyone know how long it takes for the charge to dissipate from a monitor? I'd rather not take chances, but I don't even have a ballpark to go off of.

-DK
 
If you have to ask, you probably should just take it to a shop. 25,000 volts isn't something you want to make a mistake with. Probably better to discharge the caps than try to wait it out.
 
Wow...I have opened two monitors in an attempt to fix them. Nothing happened to me and I was not able to fix any of them b/c I was hoping it was something minor like plugging a wire back, but that was never the case. I will never try to open another again..
 
I've taken apart dozens of monitors to remove the high voltage capacitors - that's the part of the monitor that's dangerous, and it's also the fun part 🙂

Anyway, there's no reason to worry as long as you don't put your finger across the terminals of the capacitor. You can just discharge it as well; I put a screwdriver across them. The only time one was charged, it punched a small hole in the screwdriver.

On the other hand, if you don't know what a capacitor is, I'd recommend you don't even try. 😉
 
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