Pixhawk 2.4.8 FC flashing white light

Hi Everyone,
I am using pixhawk 2.4.8 FC I did firmware installation then set the default parameters at the time FC was good then i did ESC calibration and motor test. After accel calibration it turning on white flash light also not initialising. How I can debug the issue?

Can you provide a link or picture to this FC?
Is it listed here?

Here is the FC link: https://www.flyrobo.in/pixhawk_px4_32bits_flight_controller?tracking=ads&tracking=paiaxahawa&gad_source=1&gclid=CjwKCAiAjp-7BhBZEiwAmh9rBa1Cr_1CVP9NZSBTNbyq0QekWlqUoPTrf1lRvqcaxISj1-eisO2GtBoCK6IQAvD_BwE.

What version firmware; Pixhawk1, Fmuv3?

Version Fmuv3, 4.5.7

Are you able to recognize anything similar from here to yours?

No, it’s stable white light

Here is a possible answer.