The infrared remote codes are stored in sunxi-ir.kl or rk29-keypad.kl . You can flash a remote.conf file via ADB. Better: Download a firmware that matches the remote that came with your box (MXQ original remote has a specific vendor ID).
RK3128 MXQ EP 68 refers to a specific hardware revision of the popular budget MXQ Pro 4K Firmware Rk3128 Mxq Ep 68
If your EP-68 shows no signs of life (no LED, no USB detection in loader mode), you are in MaskROM mode. The infrared remote codes are stored in sunxi-ir
Finding the specific firmware for the RK3128 MXQ EP 68 TV box can be difficult because these devices are often unbranded clones with varied internal hardware. The "EP 68" refers to the specific board revision, and using the wrong firmware can permanently brick the device. Key Technical Specs Processor: Rockchip RK3128 (Quad-core). Board Label: RK3128 MXQ EP 68 refers to a specific
: The RK3128 MXQ EP 68 firmware file (usually an .img or .iso ). Step-by-Step Flashing Instructions