Unresponsive after uploading OpenCat

i followed the instructions to upload OpenCat (the latest version from github), everything went as expected

now the bittle doesnt seem to boot. turning the battery on turns the blue and yellow lights on the board but nothing else happens. it makes no sounds and none of the servos move.

it doesn not respond to the IR controller

it does nothing after connecting it to the desctop app, calibration, stand etc does nothing.

have i bricked it?

how do i fix it?

thanks