Hi Kishore, generally button flashing is due to the following:
1.- The paper is jammed in the rear paper feed. Please check this (see the manual about this issue). Also check that the paper is well posed.
2.- Multiple sheets were fed at the same time. Load paper in the rear paper feed correctly and press the right button (not the power on button)
If this does not work, shut down your printer. Unplug the power cable and the USB cable (if any). Wait a couple minutes and connect both cables. Power on your printer. Check all ink levels too.
Sometimes the issue is solved uninstalling and installing again the printer software.
Finally find out if your printer comes with some kind of test.
Hope this helps.