41–50 of 128 posts
I did this when I was a teenager - with CRT monitors. Higher voltages and I had the fun of refocusing the tube and fixing the colour registration while it was on, reaching around the back while I looked at my test pattern. I learnt a lot about computing hardware and software on that Pentium box: 166 MMX (overclocked to 200MHz), 16MB RAM (later 64MB), running Debian and my resurrected 15” LG CRT. Oh, and a 56kbps mode…
I'm always wary if these guides. If you know what you're doing then yes, replacing a capacitor is a quick fix to give your hardware a new lease on life, but you can get seriously injured or even killed if you mishandled the open power supplies these devices often contain. This guide addresses the danger by saying you need to "wait for a while" without telling you what "a while" is (a minute? 5? an hour?) and how to s…
IEC 60335 and IEC 62368 state that the voltage across the capacitors must be below 34 V in 1 second after the input power is removed. Modern electronics are remarkably safe and I have never heard of anyone being shocked by power supply capacitors in the last decade. Of course cheap electronics sometimes aren't standards compliant and bleed resistors can conceivably fail hence the advice to wait a bit longer if you wa…
[edit] Ah I see this is called a bleed resistor, never mind
I feel old; I came here for a guide to repair a "VGA monitor" and instead got a flat panel.
I'm always wary if these guides. If you know what you're doing then yes, replacing a capacitor is a quick fix to give your hardware a new lease on life, but you can get seriously injured or even killed if you mishandled the open power supplies these devices often contain. This guide addresses the danger by saying you need to "wait for a while" without telling you what "a while" is (a minute? 5? an hour?) and how to s…
IEC 60335 and IEC 62368 state that the voltage across the capacitors must be below 34 V in 1 second after the input power is removed. Modern electronics are remarkably safe and I have never heard of anyone being shocked by power supply capacitors in the last decade. Of course cheap electronics sometimes aren't standards compliant and bleed resistors can conceivably fail hence the advice to wait a bit longer if you wa…
"Shawnee teenager is electrocuted while working on a computer":
https://www.kctv5.com/story/19767067/teen-electrocuted-while...
Same story as above as link not available:
https://www.dailymail.co.uk/news/article-2215200/Teenager-Sh...
And a warning:
"I just received an electric shock from an unplugged computer"
https://www.reddit.com/r/computers/comments/53cio2/i_just_re...
I'm always wary if these guides. If you know what you're doing then yes, replacing a capacitor is a quick fix to give your hardware a new lease on life, but you can get seriously injured or even killed if you mishandled the open power supplies these devices often contain. This guide addresses the danger by saying you need to "wait for a while" without telling you what "a while" is (a minute? 5? an hour?) and how to s…
Opening Amazon and buying a new one is even easier and you end up with a more modern and therefore better product.
Earlier quoted context omitted.
IEC 60335 and IEC 62368 state that the voltage across the capacitors must be below 34 V in 1 second after the input power is removed. Modern electronics are remarkably safe and I have never heard of anyone being shocked by power supply capacitors in the last decade. Of course cheap electronics sometimes aren't standards compliant and bleed resistors can conceivably fail hence the advice to wait a bit longer if you wa…
I'm working on a project where I may need to open and repair an old device that probably contains some high-voltage capacitors. Would it be relatively safe to do this if I was wearing rubber gloves + shoes, and used a multimeter to check for voltages, and a large resistor to discharge any capacitors? What kind of bleed resistor is typically used, e.g. for old TVs?
Earlier quoted context omitted.
IEC 60335 and IEC 62368 state that the voltage across the capacitors must be below 34 V in 1 second after the input power is removed. Modern electronics are remarkably safe and I have never heard of anyone being shocked by power supply capacitors in the last decade. Of course cheap electronics sometimes aren't standards compliant and bleed resistors can conceivably fail hence the advice to wait a bit longer if you wa…
How does this work in practice... do compliant capacitors have to be designed to 'leak' stored charge across an internal resistor or something like that? [edit] Ah I see this is called a bleed resistor, never mind
FTA: > it was clear what the problem was with a swollen C812 capacitor. > So no need to check anything with a multimeter or an oscilloscope, a visual inspection of the board could immediately detect the issue. I'm looking at the picture. I'm not in electronics and I can assure you it's absolutely not clear to me that this is the capacitor I'm looking for. So what should it look like ? I understand these things someti…