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Just over a week ago the PSU in my backup PC 'blew' and tripped the main house trip switch. I replaced the PC's PSU and it's now fine, however .........
Ever since then, whenever a certain mains block is switched on in another room, the mains trips.
Trouble is that it only happens some of the time.
I'm in the process of unplugging items from the 4 gang mains block, but as it's so random it's time consuming to isolate it.
Things that I've done so far to try and isolate the fault:
- Replaced the 2 ways mains socket (it was very old and the switches were sometimes sparking when switched on!)
- Replaced the 4 gang mains block
- Plugged the new mains block into a totally different socket in the same room
- Unplugged the scanner from the mains block
None of the above have helped.
Four items are plugged into the mains block: a PC, printer, scanner and monitor.
Is it possible that the other PC's PSU failure the other day made something more sensitive, perhaps another item elsewhere in the house or the main trip switch itself?
Is there a better way to isolate the cause?
Thanks
EDIT: Have just remembered something - my main PC (not the one on the block that's tripping or the backsup PC) has a UPS. For a long time now, whenever the aforementioned mains block is powered on, the UPS has been detecting what it refers to as 'electrical noise'. So obviously a 'noise' problem has existed for quite some time, but why is whatever is causing the fault now tripping the mains when it didn't before?
Ever since then, whenever a certain mains block is switched on in another room, the mains trips.
Trouble is that it only happens some of the time.
I'm in the process of unplugging items from the 4 gang mains block, but as it's so random it's time consuming to isolate it.
Things that I've done so far to try and isolate the fault:
- Replaced the 2 ways mains socket (it was very old and the switches were sometimes sparking when switched on!)
- Replaced the 4 gang mains block
- Plugged the new mains block into a totally different socket in the same room
- Unplugged the scanner from the mains block
None of the above have helped.
Four items are plugged into the mains block: a PC, printer, scanner and monitor.
Is it possible that the other PC's PSU failure the other day made something more sensitive, perhaps another item elsewhere in the house or the main trip switch itself?
Is there a better way to isolate the cause?
Thanks
EDIT: Have just remembered something - my main PC (not the one on the block that's tripping or the backsup PC) has a UPS. For a long time now, whenever the aforementioned mains block is powered on, the UPS has been detecting what it refers to as 'electrical noise'. So obviously a 'noise' problem has existed for quite some time, but why is whatever is causing the fault now tripping the mains when it didn't before?