If you have the correct software but TV3 is still scrambled, you may need to update the BISS keys manually: Press F1 + 8280 on your remote to open the key editor.
Plug the USB into the receiver. Go to Menu > USB > Data Transfer , select your file, and press OK. Strong Receiver Upgrade Software To Watch Tv3
“Always retain a backup of your current channel list (via USB export) before upgrading... to restore favorites quickly.” Alibaba.com How to Upgrade Strong Receiver Software: A Practical Guide If you have the correct software but TV3