Applies to: For AX Multibox Twin identified as TUN0137. Installed operating systems and menu names can differ; do not apply Combo or another Linux receiver’s firmware.
Match your symptom
| What you see | What to do next |
|---|---|
| No receiver menu | Check the TV input and accessible display connections before investigating the dish. |
| Satellite channels work; an app fails | Use network/application support for the installed system; this symptom alone does not justify changing LNB settings. |
Work through these checks
Confirm the receiver
Read the label and note the system already installed. If it is not TUN0137, use that model’s support instead.
What the result means: Matching identity allows this checklist; it does not authorize a firmware change.
Check the TV picture path
Select the HDMI input used by the receiver and try to display its menu. Note TV-generated messages separately from receiver messages.
What the result means: Menu absent: resolve the display path first. Menu visible: continue with channel comparison.
Compare satellite channels
Try a previously working channel without scanning or changing tuner settings. Record whether all satellite channels fail or only selected ones.
What the result means: Some working channels rule out total picture loss, but do not identify a failed part. Give the installer the channel names and exact messages.
When to stop and get help
Stop if there is heat, burning smell, damaged power wiring or unsafe antenna access. Request qualified help instead of opening the receiver or disturbing the shared distribution.
What to tell support
Record TUN0137, installed system/version, TV input, whether the menu is visible, affected channels and the exact message. Include whether the problem began after a software change; share sensitive account details only privately with the appropriate provider.
Common questions
Should I install new firmware immediately?
No. Confirm the exact receiver and system first, preserve settings and recordings, and use only an approved model-specific procedure. Another receiver’s image is not a safe reception test.
Original troubleshooting guidance based on the official sources below. Menu names can change. This is an independent guide, not a manufacturer service bulletin or a bench-tested repair.