Is the antenna actually at fault?
Antenna faults show up as a "No Signal" or "No channels found" message on the free-to-air tuner, blocky pixelation, sound dropouts, or channels that disappear one by one. Before blaming the roof antenna, check which input the TV is on. The antenna only feeds the tuner input, usually labelled TV, Antenna or DTV.
If the TV is switched to an HDMI input and reports "No Signal", it is telling you that nothing is arriving from the device plugged into that port - a Foxtel or Fetch box, a streaming stick, a recorder - or that the HDMI cable has failed. The antenna is not connected to HDMI directly, so that message is not necessary an antenna fault.
The antenna signal path has six parts: the outdoor antenna, its mast and mounting, the coax cabling, any amplifier and its power supply, the splitters, and the wall outlets. Every one of these can fail on its own, so fault finding is a process of narrowing the path down rather than replacing the antenna first.
Which TVs are affected?
The single most useful test costs nothing: compare TVs.
- All TVs in the house lost reception at once - the fault is upstream, in the antenna, the main coax run, or the amplifier power supply.
- Only one TV lost reception - the fault is in that TV's fly lead, its wall outlet, the cable branch feeding it, or the TV's own tuner.
- Only some channels are missing - signal level is marginal rather than absent. Note exactly which channels fail; multiplexes from the same broadcaster drop out together.
- Reception comes and goes - note whether it happens in rain, high wind, hot afternoons or when an appliance switches on. Intermittent faults are usually corroded connections or a loose antenna mounting.
In a block of units, ask neighbours whether they have the same problem at the same time. If they do, it is the building's shared antenna system and the strata manager or body corporate arranges the repair. Manly Electronics works on strata and unit block antenna systems regularly, so pass our details on if the building needs a contractor.
Step-by-step antenna checks
1. The fly lead
The fly lead between the wall outlet and the TV is the most common failure point, because it is the only part that gets moved, bent and stood on. Switch the TV off, unplug both ends and look for bent or missing centre pins, a crushed cable, or a plug that has been pulled part-way out of its moulding. Refit both ends firmly without forcing them. If touching or wiggling the lead makes the picture break up, replace it. A basic lead costs a few dollars; gold-plated tips make no difference to digital reception. Custom RG6 leads can be made up to length for wall-mounted or recessed TVs.
2. The wall outlet
Swap the suspect TV and its lead to a known-good outlet in another room. Then try a known-good TV and lead on the suspect outlet. Three outcomes tell you where the fault sits:
- The problem follows the lead - replace the lead.
- Both TVs fail on one outlet but work elsewhere - the outlet or the cable branch behind it needs attention.
- One TV fails on every outlet - that TV's antenna socket or tuner is at fault, not the antenna.
Loose wall plates, rusted sockets and sockets that have pulled away from the plasterboard all cause intermittent reception and should be reterminated properly. A TV with a broken antenna input socket can be repaired, or fed by HDMI from a set-top box as a workaround.
3. Splitters and amplifiers
Every splitter costs signal. If a plug-in splitter sits behind the TV feeding a second room or a recorder, bypass it temporarily and connect the TV straight to the outlet. If reception returns, the system does not have enough signal to be split that many ways.
Masthead amplifiers are powered through the coax by a small plug pack, located either in the roof space or plugged into the main antenna wall outlet. Check it is plugged in, switched on at the wall, and that its power LED is lit if it has one - not every plug pack has an indicator. A dead plug pack takes out every TV in the house at once and is frequently mistaken for a failed antenna. Do not substitute a random power adapter or remove an unidentified device from the coax - amplifier voltages and connection order matter.
4. The outdoor antenna and cabling
From the ground, look for an antenna that has rotated off its heading, a leaning or rusted mast, missing elements, or coax hanging loose from its cable ties. Salt air on the Northern Beaches corrodes antenna elements, balun connections and mast clamps faster than anywhere else in Sydney, and a storm can shift an antenna just enough to lose the weaker multiplexes. Photograph anything visibly wrong. Do not climb onto the roof.
5. Retune last, not first
Retuning only rebuilds the channel list from whatever signal is currently arriving. Retune after a genuine channel change, after moving the TV to a new house, or once the antenna fault has been fixed. Retuning while the antenna is faulty can wipe the working channels you still had.
Why antennas fail
Antennas fail from storm damage, lightning, corrosion, UV-perished cable sheathing, water tracking into a poorly sealed balun, or simply age - twenty years on a Sydney roof is a long life. Reception can also degrade gradually as the antenna drifts off alignment or connectors corrode, which is why marginal channels fail before strong ones. In strata buildings, distribution amplifiers, diplexers and combiners share the same cabling as NBN and cable TV, and a fault in any of them affects multiple units.
Who pays for the repair?
For rental properties, the owner or body corporate is responsible for the antenna, mast, cabling and wall outlets, as they are part of the premises. Your own fly leads, set-top boxes and TV are not.
In practice, many tenants choose to pay Manly Electronics COD and claim it back from the owner or agent afterwards, because waiting on approval for a simple fault is more hassle than the repair itself.
Tags: Antenna, AV Installations, how to fix
TV Antenna Repairs on the Northern Beaches and Sydney
If the checks above have not restored reception, the fault is in the outdoor antenna, the amplifier or the concealed cabling and needs a signal level test at the outlet and at the masthead. Manly Electronics provides TV antenna repairs and installations on the Northern Beaches, including Manly, Dee Why, Brookvale, Mona Vale and Palm Beach, and across Sydney.
We diagnose reception faults, replace wall outlets and coax, service and realign roof-mounted antennas, and install new systems for houses and strata units. Tell us which channels fail, which TVs are affected and what you have already tested - it shortens the diagnosis.