Confirm your model
Match Ariva S300 and its English v1 manual, not an Ariva 4K or Combo model.
How it connects
Match Ariva S300 and its English v1 manual, not an Ariva 4K or Combo model. If the TV loses the picture immediately after an output-resolution change, this manual’s RCU 540 F3 key switches between the selected resolution and 576i; first confirm the TV input and exact remote. A visible menu but missing channels is a different fault. Read existing SAT Scan strength/quality and satellite/transponder values without starting a scan: Fast Scan can add to or replace the channel list. LNB INPUT is the dish input; LOOP-OUT feeds another receiver, and the manual warns against both receivers operating together. Do not test by adding or powering a second receiver. For recording faults, compare live TV with an existing file and read PVR settings. Use Tools > USB Safe Remove before removal; USB Format destroys existing data. Preserve files and installation settings; no format, firmware, factory reset or powered coax changes.
Before buying parts
These are compatibility notes and official reference links. Confirm the fault and exact part before buying.
Model-specific parts: start with the official source
Confirm the exact model and part number with the manufacturer or provider before buying any replacement part or accessory.
Check the model and official instructions ↓