Please try to upgrade new firmware to check again.
- Unzip the attached firmware.
- Copy to a USB stick. (no other file)
- Choose software upgrade from the OSD menu.
- During the upgrade, please keep the power on until the upgrade ok. さもないと, the firmware will lose and can not power on again.
- After upgrade, please auto search the channel and test again.
Maybe you also be insteresting DVB-T DVB-T2 upgrade for DVB-T240
DVB-Tエリア用: DVB-T240-T-ファームウェア
DVB-T2エリアの場合: DVB-T240-T2-ファームウェア