The desktop computer starts working only after 15 to 20 minutes when the UPS is turned on.
The desktop computer starts working only after 15 to 20 minutes when the UPS is turned on.
Desktop Computer needs 15-20 minutes to power up once the UPS is switched on.
My system setup includes:
Corsair cx450
Amd ryzen 5 3400g
Asrock b450 pro 4
256gb Mx500
500gb bx500
2tb wd blue
4tb wd blue
Corsair carbide beloved patriot delta
It has functioned without issues since January 2020.
About a month ago, my APC bx600i stopped working, so I switched my livfast 850va inverter to UPS mode and connected the PC directly to a power outlet.
After seven days it failed again. I performed a wire test and found the PSU wasn’t working, so I had it checked at a local shop. The 5-year warranty had expired.
The PSU was repaired for $800 and it operated normally that day.
The next day it stopped functioning once more.
I took it to the same shop where it was quickly restarted. He confirmed the issue was with the power cable.
I brought it back, replaced the cable, but it remained dead.
I tested it with a new APC bx600i UPS, then directly on the power outlet, but nothing happened.
The monitor displayed the same problems: no power, no fan operation.
I used an older SMPS with the same cable and it worked during wire testing. However, it couldn’t be used for diagnostics because it’s outdated and lacks proper connectors.
After a few hours, I reconnected just the 24-pin and MB connector; it turned on and displayed BIOS. I connected the rest and everything loaded Windows successfully.
The next morning it worked for about 4-5 hours. I left it around 3 PM and returned at 8:35 PM—it didn’t start then. I left it and tried again at 9:22 AM; it started and functioned properly.
Yesterday morning it was dead again—no power, no fan activation. After 15-20 minutes, it started and operated normally for the entire day.
Today morning it repeated the same situation. It would start after this brief failure, but displayed an incorrect time. The CMOS battery is fresh, installed only a month prior. Could this be connected to the motherboard?
This seems like a mystery.
Thanks.
Cheaping out on PSU and UPS.
There are three versions of Corsair CX PSU, each with distinct markings on the side. Which one do you own?
1. Black label with green lettering.
2. White label with black lettering.
3. Black label with white lettering.
Who made it? A certified Corsair repair center or just some random person nearby?
If your car won’t start and you take it to a mechanic to fix the engine, but the mechanic only makes the engine run without fixing the car, then the car isn’t actually repaired. Just because the engine starts doesn’t mean the car is drivable. The same applies to your PSU. Even if it can be turned on, it won’t deliver power for anything beyond idle.
This is true for power delivery—PSU and UPS. You can’t skimp on these components. Since the PSU powers everything in the PC, it’s the most critical part. Never compromise on a PSU! And avoid buying used ones either.
Cheaper UPS options usually output square wave or simulated sine wave. Your APC UPS uses simulated sine wave, which isn’t compatible with your Corsair PSU. Only a true, pure sine wave is suitable. Get a proper UPS as well.
A new PSU is essential.
There’s no such thing as a good and cheap PSU. To get a good one that’s also affordable, you’d need two: one high-quality and one budget-friendly.
You already have a cheap PSU. Is the next one you’re considering also inexpensive? Or are you opting for a better one this time?
If it’s a good one, go for Tier A models—like Seasonic Focus/Vertex/PRIME, Corsair RMx/RMi/HXi/AXi, Super Flower Leadex Gold/Platinum/Titanium.
PSU tier list:
https://docs.google.com/spreadsheet...JW...1973454078
Tier A is acceptable, while Tier A+ is preferred.
550W works fine; 650W is also okay.
My three PCs are all powered by Tier A PSUs: Seasonic PRIME 650 Titanium (Tier A+), Seasonic PRIME Ultra 650 Titanium (Tier A+), and Seasonic Focus PX-550 (Tier A). Full details with pictures in my profile.