Chassis Thumbscrews, Mobo Shield has some mild electric current

[djgcruz]

Hello Guys, asking for your help

My Chassis Thumbscrews and Mobo shield is grounded.. Whenever the pc is turned off but it is plugged, it has a mild shock when i touch it. However, if i unplugged it from the socket, the mild shock is gone. Also, if my pc is turned on.. The shock is gone too.

I have an AVR which my psu is directly connected to it same for my Monitor. Also, no metal is touching my PC case. Note that my computer table where my CPU is sitting is wood. My Chassis is a K350 Cooler Master. Its feet are rubber so where could the shock originate from?

Im worried if this could damage my internal parts. Thanks guys!

 

[Aeacus]

My best bet is that it's originating from inside your PSU. When your have your PC turn off but plugged into mains, there's still live current inside the PSU. Somehow your PSU (probably PSU defect or just plain low quality PSU) is bleeding some of that voltage through and it ends up energizing the PC's metal casing. Hence the shock when you touch it.
Unplug your PC from mains and there's no current inside the PSU, no current = no shock. Though, it is possible that PSU bleeds the power only when shut down (due to the poor isolating). That would explain why there's no shock when PC is turned on.

What's your PSU make and model (or part number)?

 

[djgcruz]

My best bet is that it's originating from inside your PSU. When your have your PC turn off but plugged into mains, there's still live current inside the PSU. Somehow your PSU (probably PSU defect or just plain low quality PSU) is bleeding some of that voltage through and it ends up energizing the PC's metal casing. Hence the shock when you touch it.
Unplug your PC from mains and there's no current inside the PSU, no current = no shock. Though, it is possible that PSU bleeds the power only when shut down (due to the poor isolating). That would explain why there's no shock when PC is turned on.

What's your PSU make and model (or part number)?

Hi thanks for your reply. Is this the make or something. sorry im not sure. I might look at the box later after work.

My PSU is a Seasonic M12 520W Evo Bronze Fully Modular. Is the shock hazardous at some point for my internal parts? My PC is now a year old and i believe right from the start, it has a mild shock already as my friend told me he took a shock from the chassis when we first tried to plug the PC.

 

[Aeacus]

Yes, Seasonic is the make. Also, Seasonic is one of the best (if not the best) PSU OEM in the world and they are also the oldest PSU OEM, being in the business for over 40 years. All my 3 PCs: Skylake, Haswell and AMD are also powered by Seasonic PSUs (full specs with pics in my sig).

As far as i can tell, your PSU is Seasonic M12II-520 EVO (my Haswell build is also powered by M12II EVO series PSU but mine is 850W). M12II EVO series PSUs are good quality PSUs but since you have had that issue from the start, PSU most likely has a defect causing this. Here, i suggest you RMA your PSU. All M12II EVO series PSUs have 5 years of warranty, regardless where you live. So, take your PSU back to the store where you purchased it and also provide the invoice.

 

[djgcruz]

Yes, Seasonic is the make. Also, Seasonic is one of the best (if not the best) PSU OEM in the world and they are also the oldest PSU OEM, being in the business for over 40 years. All my 3 PCs: Skylake, Haswell and AMD are also powered by Seasonic PSUs (full specs with pics in my sig).

As far as i can tell, your PSU is Seasonic M12II-520 EVO (my Haswell build is also powered by M12II EVO series PSU but mine is 850W). M12II EVO series PSUs are good quality PSUs but since you have had that issue from the start, PSU most likely has a defect causing this. Here, i suggest you RMA your PSU. All M12II EVO series PSUs have 5 years of warranty, regardless where you live. So, take your PSU back to the store where you purchased it and also provide the invoice.

alright thanks!! One more question though.. Does this mild shock could somehow cause some damage on my parts?

 

[Aeacus]

There's shock only when you touch the metal casing and you ground the energized metal casing. Without you touching it, the metal casing is energized all the time. And yes, it can cause damage to your other components since PC case's metal parts aren't supposed to carry and/or hold the electrical current.