Capacitor exploded due to excessive voltage

March 9, 2010 at 12:02:38
Specs: Windows XP
Hey everyone,

I plugged my Dell Dimension into a British socket (220V) and forgot to reset the little switch at the back, which was set to US voltage (110V). When I plugged it in there was a very loud bang.

I assume a capacitor exploded in the PSU.

Do you think this damaged the hard discs?

I can buy a new PSU but won't bother if the whole computer was damaged.

Any suggestions?

Many thanks!

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March 9, 2010 at 12:14:41
There is no telling what might have happened. You will need a new power supply at the very least. It is unlikely that the hard disk was damaged but it is highly likely that some damage was done to the motherboard.

The only way of telling is to fit a new power supply and see what happens. If the motherboard is damaged then a repair is uneconomic.


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March 9, 2010 at 15:13:28
Shame too. Many newer PSU's autocorrect for the voltage and frequency. I agree might get or borrow a known good PSU to try.

Playing to the angels
Les Paul (1915-2009)

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March 10, 2010 at 12:44:41
A new PSU did the trick -- no damage to any other components, apart from the fuse in the cable's plug.

Thanks for the help!

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