Applies to: Exact TM-5402 M4 Lite receiver. Do not extend these limits to twin-tuner Technomate models or infer firmware menus from another TM-5402 generation. Existing recordings and timers should be preserved.
Match your symptom
| What you see | What to do next |
|---|---|
| Only fails during another recording | Compare transponders and active timers first; do not adjust the dish for a scheduling restriction. |
| A single recording also fails | Check drive recognition, selected recording device and free space before blaming simultaneous tuning. |
Work through these checks
Establish an individual-channel baseline
Wait until your existing recording finishes, or choose a time with no timer active. Tune each of the two intended channels separately. Note whether either already has a reception problem. If one cannot play even by itself, simultaneous recording is not the first issue: use the signal guide with that channel’s details. If both play normally alone, continue to compare their tuning information.
What the result means: One channel fails alone: investigate reception. Both work alone: compare the recording combination.
Compare the transponders
Use the channel information available on your receiver or an authoritative current channel listing. Compare the satellite, frequency, polarisation and symbol-rate details; two channels being on the same satellite is not enough to show they share a transponder. The manufacturer restricts concurrent channel use to the same transponder. Different transponders need separate recording times on this single-tuner model. Adding another USB drive or a passive splitter does not add a tuner.
What the result means: Different transponders: reschedule. Same transponder but failure continues: check a single USB recording next.
Check one short recording without erasing storage
With no competing timer, check that the intended drive is recognised and has free space, then try a short recording on one receivable free-to-air channel and play it back. The product specification lists USB storage up to 1 TB; it does not promise compatibility with every larger drive or prescribe a universal filesystem here. Do not format a drive holding recordings as a diagnostic shortcut. If recognition or playback still fails, ask Technomate about the exact drive and receiver version before replacing equipment.
What the result means: Single recording works: preserve that baseline and review timer restrictions. It fails: report the storage test result.
When to stop and get help
Do not remove USB storage during recording or formatting. Stop for damaged cables, overheating, liquid or burning smells. Leave mains repairs, enclosure opening and dish work to qualified help. Formatting and factory reset are not first-line tests.
What to tell support
Record which channels work individually, which combination fails, both transponders and whether a single short recording plays back. Keep drive capacity and free-space observations for support.
Common questions
Does two-channel recording mean any two channels?
No. The official M4 Lite description restricts them to the same transponder. This is not an unrestricted twin-tuner receiver.
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.