Check if the front panel of the STB box LED is okay and turned on.
If there’s no light, go to the troubleshooting process for NO POWER ON YOUR STB.
If upon checking, the STB box is okay, double check if your coaxial cable is securely in place.
Then, check the cable modem connection and the 2nd TV connection.
Ensure that the “high pass filter” must be connected to the splitter going to the RF IN port.
You should also check out if the coaxial cable is damaged. If it is, contact us for the appropriate repair service.
After all these steps, check “manual search” to test the signal input.