Thank you. At last, now my system is again up and running.
I tried your suggestion and it kinda worked.
First attempt, nothing happens, still brings me to the login screen. So I googled ways how to prompt the backup BIOS and found some.
Here's what worked for mine:
1. Turn off machine.
2. Press and hold reset button.
3. Press power button while keeping reset button pressed for 10 secs then release.
4. Wait until the backup BIOS prompts and asks to install backup to main BIOS.
5. A window will pop-up stating that the main BIOS is corrupted and needs to reflash, I hit "install"
6. After installing the bios, it will ask to boot or reboot, then will ask to load default or optimized settings in the BIOS.
7. After that, I regained control over my system.
Thank you very much. You just saved me from buying a new MOBO.