Motherboards [System] won't power-on after a power outage in our area

[reubenmijares]

My whole PC was working last night. Then a power outage happened in our neighbourhood that suddenly turns off my PC. Then I went to sleep and the power in our neighbourhood went back while I was sleeping. So I haven't got the chance to unplug the cords of my PSU from the wall outlet.

The next day I tried to switch-on my PC but the motherboard is not powering at all. All fans not working, no lights, no video. I'm guessing the cause of failure is due to power surge.

How to troubleshoot this?

Below are the things I've done:
- Checked my Corsair AX1200i PSU by pressing the self-test button and it is okay. I tried also the paperclip method, and it was ok. So I conclude my PSU is fine.
- I discharge the capacitors of my Asrock H110 Pro BTC+ mobo by pressing the built-in power switch button for 30 seconds. It didn't solve it.
- I unplugged all components such as PSU, RAM, GPU, everything except CPU, for the whole night, and then the next day I plugged them back in. It didn't solve it.
- I reset the CMOS by transferring the jumpers from pins 1 & 2 to pins 2 & 3. It didn't solve it.
- I removed the BIOS battery for a whole night then put it back the following day. It didn't solve it.
- I tried to unplug only the ATX 12v power for the CPU and then pressed the power switch, then I saw the CPU fan turns-on for a while but turns-off after immediately. This is not happening when the power cable is plugged in the ATX 12v slot. It's weird.

So how to make my mobo works again?

I haven't tried replacing the battery of the BIOS. But I believe this is a brand new mobo since I bought it 4 months ago. Actually all parts are brand new, as I what I believe.

 

[Lutfij]

1| The paperclip method is actually a misleading method to diagnose if your PSU is good or not. The paper clip doesn't exert a load to determine if it can output all 1200W's of it's power in fact, did you try working with another PSU of the same wattage and quality to rule out a damaged PSU?

2| You forgot to mention the full system's specs. List them like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:

 

[reubenmijares]

1| The paperclip method is actually a misleading method to diagnose if your PSU is good or not. The paper clip doesn't exert a load to determine if it can output all 1200W's of it's power in fact, did you try working with another PSU of the same wattage and quality to rule out a damaged PSU?

2| You forgot to mention the full system's specs. List them like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:

I don't have any spare PSU to try out. I'm wondering, if the cause is a power surge, can my PSU handle the power surge to protect the mobo?

CPU: Intel Pentium G4400 socket 1151
Motherboard: Asrock H110 Pro BTC+
Ram: Kingston Hyperx Fury 4GB DDR4
SSD/HDD: Kingston 2.5" A400 120GB SSD
GPU: MSI GTX 1080ti
PSU: Cosair AX1200i
Chassis: (None) I'm using an open frame. The frame is aluminum. The mobo is lying on a plywood held by the aluminum frame. Plywood thickness is 3mm. The GPU is connected on the PCIe slot, so no riser.
OS: Windows 10 Home