Suggested fix

Switch off your decoder and check that the cabling coming from the satellite dish is tightly connected to the correct inputs on the back of your decoder. Now switch it on again. If the error remains, it's advisable to contact a DStv accredited installer. They can conduct a thorough inspection of your installation, particularly the LNB setup, to identify and rectify the overload issue. Professional assistance is recommended to ensure your satellite dish functions optimally.