Before diving into technical firmware flashing, try these less invasive steps. Flashing firmware will , so these are always the better first choice:

(Common in M10 Pro or specific sub-models)

On some Pritom models, a Chinese menu may appear. This is likely the "Spreadtrum Factory Test Mode". Use the Volume buttons to navigate to the option that looks like 重启 (reboot) or 恢复出厂设置 (factory reset) with the help of a translation tool.

or a corrupted storage module. In these cases, it may be more cost-effective to contact Pritom Support if you are still under warranty.