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My computer won't turn on, it has blown 2 fuses. How do I fix it?

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#1 HowToCameron


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Posted 20 December 2015 - 04:24 PM

Hi my name is Cameron and I joined the pcmasterrace in January, I spent £500 on a "budget" PC with an AMD FX-630, R9 270X and Evga 500w Power Supply. I only noted the important components linking to this issue. One day I was playing on my computer, like I normally do and we had a power cut, the socket went off. In our rented house. I've had a few issues in the past with this socket. With the socket not working at all, but not like this. I waited about 10 mins of the computer being completely off. NOTE: when the computer suddenly turned off there was no bang, or noise. It just went off. After the 10 mins I turned the socket on, and the computer didn't come on. No bangs or noise. The fuse was blown. I changed the fuse, it could of been faulty to my monitor fuse. It blew that fuse too. The computer didn't come on. It's been about a week and because I moved house, to a different socket and new wiring I haven't came to fixing the computer. I've bought new fuses of 13A (which is what was recommended from the site) and I'm yet to try them. For the record, my computer has ran fine all this time without any issues at all, the computer is perfectly wired and non of my components seem to not work. The power supply has not exploded, so presumably it still works. Please suggest any ideas regarding how to fix this issue and what maybe causing it.

In advanced thanks for people who have spent the time to read and answer this post, in this amazing community. Thank you.

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#2 Platypus


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Posted 20 December 2015 - 04:48 PM

I'm guessing you mean an integral PSU fuse, possibly in the IEC lead socket? If the PSU is blowing its own protection fuse, it has failed. There doesn't have to be an indication like a bang or smell when this happens.

If this is the situation, and the system was purchased new in January, it should still be under warranty?
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#3 OldPhil



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Posted 20 December 2015 - 04:54 PM

2nd that!  House fuse means it has shorted out.  I am thinking you did not open the PSU its fuse is internal.

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#4 rqt


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Posted 20 December 2015 - 05:42 PM

Do NOT use 13 amp UK plug fuses in power leads for a PC. 5 amp is more than plenty for most computers (a 500 watt power supply even at full load should be pulling less than 3 amps at 240V).


Try a different power cord on the PC - if that also blows fuses then your power supply is probably dead. In that case you will only find out if anything else has been damaged after the power supply has been replaced.

Edited by rqt, 20 December 2015 - 05:49 PM.

#5 the_patriot11


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Posted 20 December 2015 - 08:36 PM

If the PSU is blowing its own fuse I would replace the PSU. The fact it has a fuse means chances are when your socket went out it was because of a power surge, and chances are good that the PSU is all that was blown, but you wont know that for sure until you replace the PSU. I would also invest in a high quality surge protector to protect against this in the future.



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