You're looking for information on the firmware for the "Tb-x605m" device. Unfortunately, without more context about what "Tb-x605m" refers to (e.g., a specific model of e-reader, tablet, or another type of device), it's challenging to provide precise details.
Fixes tablets stuck on the Lenovo boot logo (bootloops) or black screens. Tb-x605m Firmware
After flashing new firmware, the initial boot sequence can take anywhere from 5 to 10 minutes as Android rebuilds the system cache. Give the device ample time before assuming the flash failed. You're looking for information on the firmware for
Official firmware is always the safest option. However, Lenovo does not always make these files easily accessible to the public. Here is a strategy for finding a reliable file: a specific model of e-reader