"If it is a no-post loop then you shouldn't even see a bios/uefi screen. just a blank screen the whole time. "
It sometimes does go upto the uefi screen, sometimes even till OS selection menu, but lasts hardly 2 3 seconds and restarts, but this behaviour is inconsistent.
"Open your computer up. disconnect everything. re-seat the power supply. "
Done that with every single component.
"if it gets to the 'no disk drive detected screen' then we are making progress,"
When the HDD is disconnected it had gone to that screen once or twice, again inconsistent.
"Continue this process adding different components back in one by one with the hard drive being the absolutely last device you put in.
Your computer should only need Motherboard, power supply, CPU, Video (if there's no on-board) and ram to start up."
Doing the same currently, connected only power supply to motherboard, RAM module(i have a single module) inserted in slot named "DDR3_1" on the board, and connected monitor to onboard VGA. No HDD connected yet (I am a bit worried that this frequent restarts might damage my HDD). Disconnected the case fan as well. No PCI/SATA/USB devices connected except keyboard. But still the cpu fans starts stop after 2 3 secs stops, again starts and continues to do so with nothing on the display.