when i on my workstation, my power fuse getting tripped

June 18, 2019 at 02:38:26
Specs: Windows 10
IntelĀ® Workstation Board S5520SC.
when i on my workstation, my power fuse getting tripped. i have checked evry thing removed. but only J1B3 front panel power on sokets connected, after that its tripping

message edited by gkchguru

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June 18, 2019 at 03:20:50
Hi Gkch,

Does this happen when you switch the Workstation on, or when you are using it?
What is the rating (wattage) of your Workstation?
What is the rating of your Power Fuse (or is it a MCB) that is tripping?
Have you checked the incoming voltage? is it correct?
Do you know the age of the MCB?
Where are you based (City/State)?

Good Luck - Keep us posted.

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June 18, 2019 at 04:03:25
Hi Mike

it is happening when i switched on the Workstation.
600W SMPS, Power is also ok.
MCB is new House. residing @ Hyderabad Telangana, India. 2 Days back its worked fine in the morning. we have shutdown the machine, but power is on, in after noon we got sparkling in system and tripping sound in the room. what happened @ that time we don't know. Yesterday, i have tried to remove each and every connection and checked. every thing fine until i connect front panel power on cable connected and when on the machine we are getting the same problem.

message edited by gkchguru

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June 18, 2019 at 06:01:58
Can you locate where the "sparking" occurs - actual physical point inside the computer - which I presume is desktop/tower system?

Could be there is a short between the incoming power connections (inside the computer case) and the case itself. i.e. that one of the conductors is missing insulation very close to something metallic (or even another component on the motherboard); or the insulation is cracked, or similar and touches as above.

If possible - with a magnifying lens to make it easier) carefully check the paths for the incoming mains feed inside the case from where it arrives to where it goes next; and then follow on that path from there as well.

Another possibility is that the on/off switch on the computer is faulty - not unknown for them to fail; and its causing a shot circuit within itself - which trips the mcb?

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June 18, 2019 at 06:39:58
ok I will check and revert back trvlr. actually I am getting sparkle @ J1B3 front panel power socket on workstation motherboard (Intel S5520SC).


in above PDF 20th Page @ SS Socket.

message edited by gkchguru

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June 18, 2019 at 09:41:17
Took me a while to find the actual diagram as the page numbering you have doesn't fit with the link as posted?

It's item 6.4 - is that correct?

Might be worth blowing clean compressed air (get a can of it) around that socket - directing it especially into the pine sockets. (Obviously with all power removed...) And also ensure that the plug which goes into that socket is properly wired and assembled?

Also double check that are "no" parts of the motherboard - circuit tracks and the like - even remotely able to make contact with the case or any metal parts. Check that any standoffs are not touching tracks on the motherboard; and similarly whatever is on the back of the front panel?

Occasionally standoffs - which are normally insulated from the mainboard at least can be less than perfectly so; the insulating washer or sleeve may not always be properly isolating the entire board (and nearby tracks) from the stand off metal parts (usually a screw into the case). Initially they may be Ok but a slight movement of the case, due on occasion to normal warming up under power, can bring the motherboard/tracks into contact with meta parts of the main case via the standoff. Hope this last paragraph makes sense...?

Do you have diagram of the front panel of the computer?

I'm presuming this is a self built system?

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June 18, 2019 at 14:01:25
"600W SMPS"

Based on previous posts from India, many of the power supplies in your country are of very poor quality. The only names I can think of right now are Mercury & Zebronics, but there used to be a long list of ones to stay away from. What is the make/model of your SMPS?

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June 18, 2019 at 16:01:45
I too would question your A/C power. But you said your 'power fuse is getting tripped'. Is it an actual fuse or a breaker? If it's a breaker try replacing it. They can go bad, especially after numerous resets.

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June 18, 2019 at 20:48:48
How is the AC power connected to the workstation? Directly to the PSU or via "power" switch you mention?
If via a AC power switch, it maybe faulty.
Is it possible to connect AC directly to the PSU??

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June 19, 2019 at 20:46:38
I would look to the power supply (SMPS) as the main probability of the issue.
If possible look for a brand that is well known in USA or Europe/UK as a better brand though you will probably have to pay more for it.
If you do not trust the incoming power or want additional protection get a good UPS (battery back up) like from APC or similar name brand. It will offer additional protection of critical systems and important work. The UPS should be plugged into an outlet with no switch to it and little other load on the circuit if possible.

You have to be a little bit crazy to keep you from going insane.

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June 20, 2019 at 09:52:57
Above from Gkch suggests the starting load (occasionally) trips an mcb.

Mcb rating has not been advised - suspect it is 5 amps.
If correct and all ok, 2.73 amps are required.
What else is using the circuit when it trips?

Info on Hyderbad electricity supply:-

'The voltage cycles are quite eccentric in many regions of Hyderabad. It is marked as 220 volts ac and 50 cycles'

Home is a new build, but mcb could be faulty.
If there is another of the same rating, I would first exchange to see if fault disappears.
Although 'other' mcb could have same problem (if within mcb), as it most likely came from the same Box as the original one.

Am unsure if a low incoming voltage would cause this.

Sparking may be a Red Herring, as some Switch Contacts flash.
Good Luck - keep us posted

message edited by Mike Newcomb

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