If your device is still functional, try these built-in options first:
Use a USB drive formatted to FAT32 for the update file. tvzor tvz100zt proshivka skachat
You can sometimes force an update by holding a hidden button inside the AV port with a toothpick while plugging in the power. If your device is still functional, try these
Go to Settings > Device Preferences > About > System Update . If your device is still functional
If the device is "bricked" or stuck, you may need a manual flash. Be aware that finding the original .img or .zip file now usually requires browsing community forums.