Psu query

JezR · 27 Sep 2018 at 20:36

Hi I’ve just upgraded and have put in a psu a freind gave me, problem is the hdd wasn’t found in the bios, I then notice the hdd wasn’t powering up so tried in a different pc and still nothing, i then took a hdd that worked from the other pc and connected to mine and same thing happened it wasn’t powering up then re connected it in the pc it had worked and it then didn’t power up

Can a psu do this?

Was using the pc like normal just without a hdd connected so I would assume I’ve had a lucky escape and the rest of pc is ok?!

pastymuncher · 28 Sep 2018 at 09:47

It could be faulty and sending a surge of power to the hdd and killing it. What make and model is it?

JezR · 28 Sep 2018 at 09:50

Thermaltake dps g 750w everything else seemed to work and was playing games on it until I worked out the psu could be the problem.

EsaT · 28 Sep 2018 at 10:25

Badly failing PSU can kill all PC parts, including attempting to burn the case.

But over the spec voltage should start killing also other things than HDDs.
Unless there's spike just enough to burn some protection components of HDD.
Though TVS diode should short itself and it would be more like case of blown/burned fuse.
https://community.wd.com/t/hdd-tvs-diode-faq/14692

JezR · 28 Sep 2018 at 10:40

Everything else seemed to be working apart from the hdd, putting a new psu in later and hdd, fingers crossed!

JezR · 30 Sep 2018 at 16:22

Put a new psu in and a new hdd and works fine hdd found straight away and not getting zapped! Thanks for the help.