If your TV still boots to the home screen, you can check for the latest official version without manual files:
: A verified USB firmware package for the TCL LED43D2930 (Chassis TP.MS6308.PB775) is available on KenotronTV . Note that this site often requires registration or a technician account to download full dumps. Manual Update Procedure
For the most secure and up-to-date firmware, it is best to use TCL's official update methods or local support portals: