# One TV Works but Another Does Not: What Should You Test? Use controlled TV, fly-lead and outlet swaps to isolate a one-room reception fault before replacing the antenna or television. Canonical HTML: https://www.brisbanecctvexperts.com.au/guides/one-tv-works-another-doesnt/ Markdown twin: https://www.brisbanecctvexperts.com.au/guides/one-tv-works-another-doesnt.md ## Direct answer Try the non-working TV with a known-working lead and outlet, then test the working setup at the failed outlet. A room-level failure points toward the lead, wall point, branch or splitter output. ## Overview One working television is evidence that the shared antenna may still be usable. Test which component the failure follows. ## Full article ## 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](/services/tv-point-installation-brisbane/) owns the room-level outlet path, while [TV reception diagnosis](/services/tv-reception-issues-brisbane/) owns wider or uncertain faults. ## 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](https://www.acma.gov.au/tv-reception) 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. ## 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. ## 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](https://help.abc.net.au/hc/en-us/articles/360001144575-I-m-having-TV-reception-issues-Can-you-help) 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](/services/tv-point-installation-brisbane/). ### 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. ## 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. ## 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](/guides/do-tv-antenna-boosters-work/) to understand why amplification should follow measurement rather than guesswork. ## Apartments and Shared Systems An apartment outlet may connect to common MATV infrastructure rather than an individual rooftop antenna. Compare another outlet in the unit and ask whether neighbouring units have the same issue. A problem affecting several units should be escalated through the building or shared-system owner rather than treated as several failed televisions. Brisbane CCTV Experts provides [MATV and commercial TV system support](/services/matv-commercial-tv-systems-brisbane/) where the job fits. ## 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”. ## 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. ## Frequently Asked Questions ### Why does the bedroom TV say no signal when the lounge TV works? 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? 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? 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? 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](/guides/tv-antenna-problems-that-look-like-tv-problems/) for the full comparison. ### When should I request help? 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. ## Frequently asked questions ### Why does the bedroom TV say no signal when the lounge TV works? 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? 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? 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? 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](/guides/tv-antenna-problems-that-look-like-tv-problems/) for the full comparison. ### When should I request help? 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. ## When this service may fit - You want to understand the decision before asking for a quote. - You are comparing options and need a practical way to narrow the next step. - You have a fault, concern, or planning question that affects camera count, placement, recorder, app access, or privacy. - You want to send better details so the recommendation is based on the property, not guesswork. ## What the planning covers ### Plain-English answer The guide should make one CCTV decision easier without hiding the important caveats. ### Quote relevance Each guide points back to the service page it supports. ### Decision factors The page highlights the variables that change the answer: layout, cabling, lighting, recorder, network, storage, or legal caution. ### Next step When the guide reaches its limit, the customer should know what to send for a sharper quote. ## Options and trade-offs | Option | Best for | Watch out | | --- | --- | --- | | Use the guide only | Early research and simple understanding. | The property may still change the recommendation. | | Get a Quote | When camera count, layout, or install path needs a real answer. | Send details instead of guessing. | | Book repair/help | App offline, no recording, blurry footage, or poor night vision. | Changing settings blindly can make diagnosis harder. | ## Property fit ### Homes Entry, driveway, side access, remote viewing, legal/privacy basics, and package decisions. ### Businesses Counter, stock, staff/customer areas, recorder storage, and manager access. ### Commercial sites Custom layout, storage, cabling, access control, and multi-user review needs. ### Existing systems Troubleshooting, repair, recorder, app, and upgrade decisions. ## Common mistakes - Using guide content as a substitute for property-specific planning. - Choosing camera count before listing the areas to cover. - Ignoring recorder, storage, and app handover. - Treating legal/privacy basics as legal advice. ## What to send for a quote - Suburb and property type. - The decision or issue you are trying to solve. - Areas to cover, photos, existing equipment, or app screenshots where relevant. - Whether you want install, repair, upgrade, app setup, or planning help. ## Related public pages - [TV Point Installation Brisbane](https://www.brisbanecctvexperts.com.au/services/tv-point-installation-brisbane/) - [TV Reception Problems Brisbane](https://www.brisbanecctvexperts.com.au/services/tv-reception-issues-brisbane/) - [TV Antenna Repairs Brisbane](https://www.brisbanecctvexperts.com.au/services/tv-antenna-repairs-brisbane/) - [Contact](https://www.brisbanecctvexperts.com.au/contact/) ## Brisbane CCTV Experts contact details - Phone: [1300 269 162](tel:1300269162) - ABN: 22 644 399 959 - Email: [sales@brisbanecctvexperts.com.au](mailto:sales@brisbanecctvexperts.com.au) - Office: Unit 8, 68 Bryants Road, Shailer Park QLD 4128 - Hours: 24 hours, 7 days - Quote: [Request a quote](https://book.servicem8.com/request_booking?uuid=019f5583-51fe-74ac-9621-cc7e13c7ec2b) Specific insurance, review, project, accreditation, warranty, licence-number and fixed-pricing claims should only be relied on where visibly verified on the canonical public HTML page.