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My dell pc Power Supply uses 220V and my country standard too. And i chage the Voltage from 220v to 110 V at the back of PSU. And suddenly makes sound and smokes after that its stops working. chance to repair the power supply unit Or buy new?
Dawit Yohannes
Posted 2019-08-07T20:12:00.083
Reputation: 11
1
Yea, definitely time to get a new PSU. Hopefully that was the only thing damaged, but you won't be able to tell until you get a working PSU in there.
Fingers crossed.
Michael Frank
Posted 2019-08-07T20:12:00.083
Reputation: 7 412
1
You've destroyed your PSU. Time to buy a new one.
By switching the input selector from 240V -> 110V, you were telling the PSU "The input voltage is only 110V now."
Except it wasn't 110V. You're still in a country with a 220V supply, so you effectively gave it twice the voltage it was expecting.
Hence the smoke.
On the plus side, at least now you know what that switch does!
Mr Ethernet
Posted 2019-08-07T20:12:00.083
Reputation: 3 563
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Its probably cheaper to buy a new PSU because of labour costs, but if you live in a country where labour is cheap you may be able to get it repaired more cheaply. No one can answer this definitively
At a wild guess there is a capacitor that went bang. If you replace the capacitor you could be fine, but playing inside a PSU is supposed to be a bad idea... (In other words lots of people recommend against it)
davidgo
Posted 2019-08-07T20:12:00.083
Reputation: 49 152
3It's a desktop. Laptops don't have voltage input selectors on them. – Mr Ethernet – 2019-08-07T20:31:38.463
@wrecclesham of-course (doh!) – davidgo – 2019-08-07T20:35:48.200
it may be an idea to remove that pic. Some people might not realise that that kind of damage is not realistic, and this photo is not "real" (ie a power supply cant just burst into flames like that) – davidgo – 2019-08-07T20:50:28.933
It was a great pic though! – Mr Ethernet – 2019-08-07T20:51:51.307
PSUs can catch fire. It's not common but there are numerous documented instances of it happening: https://linustechtips.com/main/topic/982932-evga-psu-lit-my-house-on-fire-/
– Mr Ethernet – 2019-08-07T21:07:45.340Clicked on link. Was disappointed. Ni evidencr if PSU burning. (not really a surprise. Metal does not burn) – davidgo – 2019-08-07T21:30:43.277
It isn't the metal chassis that catches fire but the components, which mostly consist of non-metal elements. The poster even stated: "Insurance took the entire set up as evidence, fire inspectors confirmed it was the power supply. Is this common?? " Forensic investigators confirmed it was the power supply. If something is capable of smoking, it's capable of burning at a high enough temperature. This is why server room fire suppression systems exist. – Mr Ethernet – 2019-08-07T21:53:07.843
1Should be labeled the auto destruct switch! – Moab – 2019-08-07T22:25:08.540
@wrecclesham Absolutely a PSU/computer can be the catalist to start a fire. – davidgo – 2019-08-07T22:33:30.780