4.3" LCD cape shows white screen on Debian boot


I have a 4.3" LCD cape from 4DSystems which works fine on Angstrom on BBB.
I wanted to try Debian and saved this Debian image “https://rcn-ee.com/rootfs/2015-08-17/microsd/bb-debian-8.1-console-armhf-2015-08-17-2gb.img.xz” on a 16GB microSD card and powered ON BBB while keeping the BOOT button pressed till the LEDs started flashing.

The issue:
The LCD screen turns ON and remains white all the time. Hence I can’t see the terminal or any UI on the screen. Wtat could be the issue?

bb = beagleboard (classic/xm)
bone = beaglebone white/black/green..


It is a “Beaglebone Black, Revision A5C”.

Exactly... Yet you wrote an image for the "beagleboard classic/xm" to
the microSD...

bb-debian-8.1-console-armhf-2015-08-17-2gb.img.xz = beagleboard