Nokia UNA50GV210I Vestel 17MB170 23789624 firmware/eMMC for boot loop

Hello,
I probably need firmware (USB update package or eMMC dump) for the following TV:

TV model: Nokia UNA50GV210I (StreamView)
Main board: Vestel 17MB170, revision 130519R4
Panel: VES600QNZB-N4-Z01
LCM string: VES600QNZBN4Z01FATGN50000_140WQAMAB
Board part number: 23789624

Symptom: Continuous boot loop. TV boots, accepts input for ~2 seconds, screen freezes after ~30 seconds, then reboots. Tried USB reset with StreamView's cvt_autorun_cmd file but did not fix the issue.
I can provide photos of the board and panel labels. Any help appreciated.