Hi recently got a brand new PC: i9 9700k, AORUS ULTRA z390, 16GM RAM and no GPU yet.
I took out my good old APC CS-350 backups ( https://www.amazon.com/APC-BK350EI-Back-UPS-Discontinued-Manufacturer/dp/B00006BBIK ) I used in 2002-2007 with my old PC. I removed its old battery and bought a new one from a trusted shop, a battery made in germany or by a german company. I tested the UPS with an older computer (psu 450w) and its monitor at my job and it worked flawlessly.
Then I came home and decided to hook it up to my new PC. I have first of all switched off the switch on the PSU to cut its power. Then I plugged in the monitor and PC to the back ups. I put backups' plug into wall socket, then I switched on the switch on the PSU and I began hearing crackling noises from the PSU, I switched it off waited a few second and switched it on back again and crackling noises went at it again. I got scared a bit. Plugged everything out and smelled the PSU vents and there was indeed some very weird smell.
I then plugged my PC regularly into the wall socket without a UPS - it worked nicely as if nothing happened. But when the PC is plugged in but not yet turned on I hear a coil whine like this:
View: https://www.youtube.com/watch?v=A_vXA058EDY
And sometimes at the moment when I press the turn on button I hear a click from the PSU when the computer starts.
Why did this happen? Is the UPS not strong enough? Was the PSU defective? I'm affraid to use that UPS again with my new pc.
I took out my good old APC CS-350 backups ( https://www.amazon.com/APC-BK350EI-Back-UPS-Discontinued-Manufacturer/dp/B00006BBIK ) I used in 2002-2007 with my old PC. I removed its old battery and bought a new one from a trusted shop, a battery made in germany or by a german company. I tested the UPS with an older computer (psu 450w) and its monitor at my job and it worked flawlessly.
Then I came home and decided to hook it up to my new PC. I have first of all switched off the switch on the PSU to cut its power. Then I plugged in the monitor and PC to the back ups. I put backups' plug into wall socket, then I switched on the switch on the PSU and I began hearing crackling noises from the PSU, I switched it off waited a few second and switched it on back again and crackling noises went at it again. I got scared a bit. Plugged everything out and smelled the PSU vents and there was indeed some very weird smell.
I then plugged my PC regularly into the wall socket without a UPS - it worked nicely as if nothing happened. But when the PC is plugged in but not yet turned on I hear a coil whine like this:
And sometimes at the moment when I press the turn on button I hear a click from the PSU when the computer starts.
Why did this happen? Is the UPS not strong enough? Was the PSU defective? I'm affraid to use that UPS again with my new pc.