Why Is My TV Reception So Bad? 9 Causes Brisbane Installers Actually Find

Pixelated picture on Channel 9. SBS disappearing every time it rains. A "no signal" error on a TV that worked fine last month. Poor TV reception is one of the most common problems we get called out for across Brisbane - and after hundreds of reception jobs, the cause is almost always one of the nine problems below.

This guide walks through each cause in the order we typically check them, what the symptoms look like, and which fixes you can safely try yourself before calling an installer.

First: Rule Out the Simple Stuff

Before assuming the antenna is at fault, do a manual retune. Digital channels occasionally move frequencies, and a TV that hasn't rescanned since the change will show missing or broken channels even with a perfect antenna. Run a full channel scan from your TV's setup menu, and check the antenna fly lead is firmly seated in both the wall plate and the TV.

The ACMA's TV reception troubleshooting guide is a good independent checklist for these basics. If a rescan and cable check don't fix it, the problem is upstream - and that's where the nine real causes come in.

1. Corroded Connections and Water Ingress

The most common fault we find in Brisbane. Queensland's storm season drives moisture into antenna connections, cable joins, and wall plates. Corroded F-connectors and water-damaged coaxial cable degrade the signal gradually - reception gets worse over months, often deteriorating noticeably in wet weather.

The fix: replacing corroded connectors and resealing entry points is a straightforward repair job, usually cheaper than people expect. This is the first thing we check on any antenna repair call-out.

2. An Analogue-Era Antenna Past Its Life

If your antenna went up before roughly 2013, it was designed for analogue broadcasts and is likely rusted, delaminated, or simply not suited to the current digital channel frequencies. Old band III/analogue combos limp along for years before finally dropping channels.

The fix: replacement with a modern digital antenna. Repairing a 20-year-old antenna is rarely worth it - the labour costs the same, and the hardware fails again.

3. Antenna Misalignment After Wind or Storms

Digital TV antennas need to point accurately at the transmitter. Brisbane's summer storms regularly rotate antennas a few degrees on their mounts - enough to drop a stable signal below the digital cliff, where the picture doesn't degrade gracefully but freezes and pixelates instead.

Symptoms: reception was fine, then suddenly wasn't after a storm. The fix: realignment with a signal meter. Eyeballing it at the same direction as the neighbour's antenna gets you close, but fringe-area homes need meter-accurate alignment.

4. 4G and 5G Mobile Interference

Mobile networks now operate in the 700 MHz band - spectrum that used to carry analogue TV. If you live near a mobile tower and your antenna or amplifier predates 4G filtering, the tower can bleed straight into your TV reception. We see this constantly in suburbs where new towers have gone up: reception problems that appear from nowhere, often affecting specific channels.

The fix: a 4G/5G filter, or an antenna with filtering built in. Every new antenna we supply through our TV antenna installation Brisbane service includes 4G/5G filtering as standard.

5. A Failing Masthead Amplifier

Masthead amplifiers (boosters) sit at the top of the mast and strengthen weak signals. When they fail - or when their power injector inside the house gets unplugged during a TV cabinet reshuffle - every TV in the house loses reception at once.

Quick check: if all TVs failed simultaneously, look behind the main TV for a small plugpack labelled as a power supply and make sure it's switched on. If the amplifier itself has failed, it needs replacement. Our signal booster service covers testing, replacement, and the equally common opposite problem: an unnecessary booster overloading the tuner in a strong-signal suburb.

6. Too Many Splits, Too Little Signal

Every splitter divides the available signal. A single antenna feeding four or five TV points through a chain of cheap two-way splitters can starve the furthest outlet. The TV in the back bedroom pixelates while the living room is fine.

The fix: a properly designed distribution setup - one quality splitter or a distribution amplifier sized to the number of outlets. If you're adding TVs, our extra TV points service handles the cabling and distribution as one job.

7. You're in a Fringe Signal Area

Brisbane's main transmitters sit on Mt Coot-tha. By the time the signal reaches the Caboolture corridor - Caboolture, Morayfield, Burpengary, Narangba - or hilly pockets of the outer west, it's a fraction of the strength an inner-city home receives. A basic antenna that works in Chermside simply doesn't collect enough signal out there.

The fix: a high-gain antenna, mounted as high as practical, precisely aligned, sometimes paired with a masthead amplifier. Terrain matters too - a hill between you and Mt Coot-tha can shadow the signal even in otherwise well-served suburbs.

8. Weather and Seasonal Effects

Heavy rain attenuates TV signals, and in certain atmospheric conditions distant transmitters can interfere with local ones (seasonal ducting). If your reception only misbehaves in specific weather, your signal margin is too thin - fine on a clear day, below the cliff when conditions degrade.

The fix: the same as fringe areas - improve the collected signal so weather variations no longer push it below the threshold.

9. Damaged or Ancient Cabling

Coaxial cable degrades, and older homes often have brittle, kinked, or non-quad-shield cable that leaks signal and lets interference in. Renovations are a classic trigger: a nail through a hidden cable run, or a crushed cable behind new cabinetry.

The fix: replacing the affected run with quality quad-shield coax. We test signal at the wall plate versus at the antenna to isolate exactly where the loss occurs.

How an Installer Diagnoses This in Practice

The reason professional diagnosis is fast is measurement. A signal meter at the antenna, at the splitter, and at each wall plate shows exactly where the signal is strong, where it drops, and whether the problem is collection (antenna), distribution (cables and splitters), or interference. That turns "it could be anything" into a specific fix with a fixed price.

If you've done the rescan and cable checks and reception is still poor, our TV reception repair service covers the full diagnosis and fix, backed by a 5-year workmanship warranty. Persistent problems in genuinely poor coverage areas sometimes have a different answer entirely - for rural fringe properties we occasionally recommend satellite or a Starlink installation for streaming instead of fighting an unwinnable signal battle. We'll tell you honestly which situation you're in.

Quick reference - match your symptom to the likely cause:

• All channels gone on every TV - failed masthead amplifier or unplugged power injector (cause 5)
• Specific channels pixelating, others fine - interference or marginal signal (causes 4, 7, 8)
• Worse in wet weather - water ingress or thin signal margin (causes 1, 8)
• Started suddenly after a storm - misalignment (cause 3)
• One room bad, rest fine - distribution or cabling (causes 6, 9)
• Gradually worsening over months - corrosion or ageing antenna (causes 1, 2)

Still stuck? Call us on 0406 700 340 - describing your symptoms over the phone is usually enough for us to tell you what you're dealing with before we come out.