Seemax Rg500 Skachat Proshivku -

Test the device using a different mini-USB cable and a known-good power source to rule out cable failure.

Most SeeMax RG500 files found online are EEPROM dumps . You cannot install these by putting them on an SD card; you need a hardware programmer (like a CH341A) to flash the chip directly. seemax rg500 skachat proshivku

Look for a small "Reset" pinhole on the side and press it with a paperclip while the device is powered. Test the device using a different mini-USB cable