Repair AV equipment.

Whether it is a degraded satellite signal or a malfunctioning amplifier, professional AV repair ensures your hardware is calibrated correctly and safe to use. This guide covers what you can expect when hiring a specialist to restore your home entertainment system.

What Does the Work Involve?

• System Diagnostics: Using spectrum analysers and signal meters to identify where the signal chain is breaking down.
• Connectivity Testing: Checking physical ports, HDMI cables, and optical leads for continuity and "handshake" errors.
• Aerial and Satellite Alignment: Re-positioning or repairing external receivers to ensure optimal dBmV levels.
• Hardware Repair: Replacing internal components such as power supply boards, capacitors, or logic boards in out-of-warranty equipment.
• Software Optimisation: Updating firmware, resetting network configurations, and re-calibrating audio-visual settings for the specific room environment.
• Cable Management: Replacing degraded copper cabling with shielded alternatives to prevent electromagnetic interference.

Typical Costs

Total costs are largely influenced by the complexity of the system and the accessibility of the components. If a technician needs to de-mount a 75-inch TV from a bespoke wall recess or access a high chimney stack, labour costs will increase significantly.

How Long Does It Take?

• Simple Signal Issues: 30 to 60 minutes for re-tuning or cable replacement.
• Aerial/Satellite Alignment: 1 to 2 hours, depending on roof access and weather conditions.
• Surround Sound Troubleshooting: 2 to 3 hours to trace faults across multiple speakers and receiver zones.
• Component-Level Repairs: 3 to 7 days if the unit needs to be taken to a workshop for soldering or part sourcing.

DIY or Professional?

Homeowners can easily handle basic tasks like swapping HDMI cables, power-cycling routers, or running a software update. However, once the issue involves internal circuitry, signal interference, or working at heights, a professional is essential.

Attempting to repair internal TV components or power amplifiers is dangerous due to high-voltage capacitors that can hold a charge even when the device is unplugged.

Professional installers also have access to expensive signal meters that can pinpoint "LTE interference" from 4G/5G masts, which a DIYer simply cannot detect. If your repair involves new electrical spurs, ensure the work complies with Part P of the UK Building Regulations.

Choosing the Right Tradesperson

• Check Accreditations: Look for members of the CAI (Confederation of Aerial Industries) or CEDIA (Custom Electronic Design and Installation Association).
• Insurance: Ensure they hold valid Public Liability Insurance, especially if they are working on your roof or handling expensive OLED screens.
• Specialism: Confirm they have experience with your specific brand (e.g., Sonos, Sky Q, or high-end brands like Bang & Olufsen).
• Questions to Ask:
  • Do you offer a guarantee on both the parts and the labour?
  • Is your call-out fee fixed, or does it cover the first hour of work?
  • Can you provide a signal strength report after the repair is complete?

UK Regulations

• Working at Height: Technicians must follow the Work at Height Regulations 2005 when repairing aerials or satellite dishes.
• WEEE Directive: If equipment is beyond repair, your tradesperson should dispose of it according to the Waste Electrical and Electronic Equipment regulations.
• Part P: Any new fixed electrical wiring for your AV system must be installed by a competent person to meet UK safety standards.

Common Problems

• Signal Pixelation: Often caused by water ingress in the external "balun" of the aerial or a misaligned dish.
• HDMI Handshake Failure: When the TV and soundbar fail to communicate, often solved by replacing cables with certified Ultra High Speed versions.
• Intermittent Sound: Frequently traced back to "cold" solder joints or loose speaker terminals rather than a total hardware failure.
• Wireless Dropouts: Caused by local Wi-Fi congestion; professionals can often fix this by switching devices to a dedicated 5GHz channel or hardwiring via Ethernet.

Frequently Asked Questions