If you are looking for drivers for Akai Professional music gear (like MPC or MPK series), those are found on the Akai Pro Downloads Page , but they do not use the M538 TV firmware naming convention.

Multi-part RAR archive (Part 13 of a larger set).

Likely contains CtvUpgrade.bin and/or mboot.bin for USB flashing. Critical Download & Usage Notes

Official firmware for AKAI TVs is often hosted on regional distributor sites. For example, the Salvadori Group FTP provides many AKAI firmware updates, though specific model availability varies.

Flashing firmware is a high-risk procedure. Installing the wrong version for your specific panel or mainboard revision can "brick" the TV (render it unbootable). Always verify the Mainboard Model Number (printed on the PCB inside the TV) before proceeding. Typical Installation Steps