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Few days ago my main monitor did not turned on. I opened it and discovered three capacitors, of 1000 uF/16 V each, in bad shape. Since all stores here in my town are closed due the quarentine, I'm trying to find these capacitors in old electronics not working that I've found here in my house.

I did not found the three capacitors with the original values that my monitor board require but I've found three capacitors of 1000 uF/10 V each, and visually they look fine. Can I use them? Which are the effects of switching from 16 V to 10 V capacitors with the same capacitance? I'll test them soon as my electronics tools that I bought arrive in my house (I'm a beginner with electronics and still studying the basics).

I've also have found capacitors of 470 uF/16 V, just in case this information be important.

Thank you very much!

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  • \$\begingroup\$ Would you expect a 1 amp fuse to work in place of a 10 amp fuse? \$\endgroup\$
    – Andy aka
    Commented May 5, 2020 at 15:11
  • \$\begingroup\$ Is it powered from 12 V by any chance? Your chances of not breaking anything should be much higher with two 470 uF/16 V in parallel to replace each 1000 uF/16 V. \$\endgroup\$
    – winny
    Commented May 5, 2020 at 15:11
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    \$\begingroup\$ If you ordered electronics tools, is there a reason you can't order appropriately rated replacement caps? \$\endgroup\$
    – Ron Beyer
    Commented May 5, 2020 at 15:14
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    \$\begingroup\$ Why not parallel 6 pices of 470µF? then you almost got 1000µF. if SMD stack them, if radial lead with long legs bend them and place them a bit higher if possible? \$\endgroup\$
    – user103776
    Commented May 5, 2020 at 15:20
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    \$\begingroup\$ @AntonIngemarson 6? Wouldn't 2 caps give you 940uF? \$\endgroup\$
    – Ron Beyer
    Commented May 5, 2020 at 15:24

1 Answer 1

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The 16V might be for reason. If the actual voltage rail is below 10V it might be fine. If it is over 10V then it is not fine. But capacitors have also other properties than capacitance and voltage. For example ESR. If the old caps were low-ESR caps, and you put standard caps there, it is also not fine. It completely depends on what the original capacitors were doing in the circuit.

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  • \$\begingroup\$ Nice to know it. In fact, some of the capacitors of other capacitances avaible on other boards are low ESR, while the capacitors on the monitor board, aren't. Didn't know it was that important. Thanks. \$\endgroup\$
    – Atila Coimbra
    Commented May 5, 2020 at 16:38

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