Recently observed that a long pause or delay of up to 30 to 60 seconds to show the boot menu on my home built PC after the power button pressed. There are solution of replacing the button cell in the motherboard and changing the PSU of the system.
Then I came across another post suggested that to remove any additional USB devices connected to the PC except the keyboard and mouse. Then I remembered, few days back I inserted an USB pen drive but not removed from the PC after the copying was done.
After the USB Pen Drive removed, the system boots normally.
Hope this will help someone.
