Full antenna guide
One TV Works but Another Does Not: Antenna, Outlet or Television?
Use the section map if you only need a quick answer. The full guide covers the diagnostic path, decision factors, practical next steps, and FAQs.
01 / When to call
One Working TV Is Evidence: Use It to Isolate the Fault
If one television receives free-to-air channels and another does not, the rooftop antenna may still be working. The fault can sit at the second TV, its tuner settings, fly lead, wall point, branch cable or the splitter output serving that room.
Do not replace the antenna or failed television first. Use controlled swaps between the working and non-working setup to identify which part the problem follows.
Short answer
Test the non-working television with a known-working antenna lead and, where practical, at the working outlet. Then test the working television or lead at the failed outlet. If the fault stays with the room, investigate the outlet and branch. If it follows the television, check its tuner and settings.
For Brisbane properties, TV point installation and repair owns the room-level outlet path, while TV reception diagnosis owns wider or uncertain faults.
02 / Service detail
The Four Parts You Can Compare
Television
The television contains the digital tuner and channel list. Incorrect source selection, incomplete tuning, a tuner fault or a model-specific setting can prevent free-to-air reception even when the screen, streaming apps and HDMI inputs work.
Fly lead
The short coaxial cable between wall point and television is easy to overlook. A bent, loose or damaged lead can affect one setup while every other room works.
Wall point and branch cable
Each outlet may have its own branch from a splitter or distribution system. One poor termination, damaged run or disconnected branch can isolate the failure to one room.
Shared antenna and distribution
The rooftop antenna, main cable, splitter and any amplifier serve some or all rooms. A shared fault is more likely when several outlets lose the same channels together.
The ACMA’s TV reception guidance lists antennas, cables, fly leads, connections, receivers, splitters and boosters among the components to check. It also notes that splitters reduce signal level, which is relevant when one longer or weaker branch fails before another.
03 / Service detail
The Three-Swap Test
Test 1: Use the working fly lead
Take the known-working fly lead to the non-working TV and outlet. If reception returns, the original lead is the likely fault.
Keep the test controlled: change one item at a time. Swapping the TV, cable and outlet together does not show which change mattered.
Test 2: Try the non-working TV at the working outlet
Where the television can be moved safely, connect it using the working lead at the known-working outlet.
- If it receives channels there, the original room path is the likely problem.
- If it still fails while the other television works there, the television tuner, channel setup or antenna input becomes more likely.
Do not move a large wall-mounted television or create a lifting hazard for this test. An installer can test the outlet with suitable equipment instead.
Test 3: Try the working TV or lead at the failed outlet
If the known-working setup fails at the second outlet, focus on that wall point, branch cable or splitter output. If it works, revisit the original television and fly lead.
This test is especially useful after a renovation, furniture move, new wall plate or additional outlet.
04 / Service detail
What Each Result Usually Means
The fault follows the fly lead
Replace the lead with a suitable, sound cable and retest. Avoid unnecessary length, tight bends and loose connectors.
The fault follows the television
Confirm the TV is on its tuner input, check the antenna connection and review its channel tuning. A controlled rescan may be reasonable after confirming a usable signal at the outlet. The ABC’s reception troubleshooting guide recommends checking whether the problem affects all channels and comparing nearby reception before assuming a single cause.
The fault stays with the outlet
The wall plate, connector, branch cable or splitter output may need testing. This is a good fit for TV point repair or installation.
Several outlets are weak
Move back toward the shared splitter, amplifier, main cable and antenna. Several weak outlets can indicate distribution loss or a shared reception fault.
Every outlet loses the same channels
Check for a broadcaster issue, ask nearby neighbours and record the affected channel groups. If the problem is limited to the property, request whole-system diagnosis.
05 / Service detail
Why Repeated Rescanning Can Mislead You
A channel scan stores services the TV can find at that time. If reception is weak during the scan, the TV may omit channels. The empty channel list then looks like a tuning problem even though the reception fault remains.
Rescan after checking the connection and confirming the outlet has a usable signal. Do not use repeated rescans as a substitute for diagnosing pixelation or intermittent loss.
06 / Service detail
One Room Fails After Adding Another TV Point
Adding a branch changes signal distribution. A splitter reduces the level available to each output. That does not mean every multi-TV home needs a booster, but it does mean the complete outlet plan should be tested.
If one branch has a longer cable run or weaker connection, it may fail before the shorter branch. Use the booster decision guide to understand why amplification should follow measurement rather than guesswork.
08 / Service detail
Quote-Preparation Checklist
Send:
- the suburb and property type;
- the number of TVs and wall points;
- which combinations work and fail;
- results from any safe fly-lead or outlet swaps;
- affected channel groups;
- whether streaming and HDMI inputs work;
- whether the fault followed a renovation, storm or newly added outlet;
- photos of the wall point, fly leads and accessible splitter or powered equipment;
- whether the property uses a shared building antenna.
These observations give the enquiry more diagnostic value than “no TV signal”.
09 / Service detail
The New-Television Room-Swap Trap
A new television failing in a room does not prove the new tuner is faulty. The old television may have been tuned when reception was stronger, may tolerate the branch differently, or may have been connected with another lead. Likewise, moving a working television into a room and changing its cable at the same time creates two variables.
Keep the comparison controlled. Label the known-working lead and outlet, confirm the input used, and change only one part for each test. Write down the result instead of relying on memory. If the equipment is heavy, wall-mounted or difficult to move, stop and have the outlet tested rather than risking damage or injury.
10 / Questions
Frequently Asked Questions
Why does the bedroom TV say no signal when the lounge TV works?
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The bedroom fly lead, outlet, branch cable, splitter output or television tuner may be the cause. Test one known-working component at a time.
Can one splitter output fail?
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Yes, but the connection and branch cable can also fail. Testing at the splitter and outlet separates the component from the cable run.
Should I buy a booster for the second TV?
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Not before checking the branch and measuring the available signal. A booster cannot repair a failed outlet or cable and can overload the receiver when gain is unnecessary.
Does a working streaming app prove the television is fine?
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It proves the screen and app path work, not that free-to-air reception and the TV tuner are receiving a usable signal. Use the TV-versus-antenna fault guide for the full comparison.
When should I request help?
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Request help when the controlled swaps point to an outlet or branch, several rooms are affected, the fault is intermittent, or safe indoor checks do not isolate it. Brisbane CCTV Experts accepts enquiries 24 hours, 7 days.