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Complete Pixel Solutions

Technical guides

AV Repair Guides: LED, Lighting & Audio Fault Symptoms

Fault symptom guides written the way somebody actually describes a problem, rather than the way a manual indexes it.

Rear panel of an LED display panel with the cover open, exposing green circuit boards and internal wiring.

Video

LED module ribbon cable fault: scrambled pixels between modules

Garbled pixels across two or more modules usually mean a flat ribbon or a tired board-to-board connector. Here is how to prove it and what we fix on the bench.

27 October 2026

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CPS technician servicing an opened Robe moving head at the workshop bench, with more fixtures waiting behind

Lighting

Moving head no DMX response while the rest of the line works

One fixture deaf to the desk while the rest of the line works. How to tell a settings error from a dead DMX receiver, and what we can repair at component level.

20 October 2026

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CPS technician soldering a faulty pixel on a lit LED module, one amber LED glowing among green

Video

LED panel colour shift after outdoor use: what's failed

Hard edges mean hardware, soft gradients mean ageing. How we diagnose colour shift across an outdoor LED panel, and what a cross-swap proves before you recalibrate.

13 October 2026

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Rear panel of an LED display panel with the cover open, exposing green circuit boards and internal wiring.

Infrastructure

LED receiving card not detected by the processor: where to look

The processor reports a missing card, but the card itself is frequently healthy. How to separate a sagging power rail from a broken data path, and what we can repair.

6 October 2026

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ONE PANEL, EIGHT MODULES1231ONE PIXELA rework. One package, or its pad.2A CLUSTERUsually the driver behind them.3A WHOLE MODULEOften not the module. Look upstream.

Video

One LED module black: power fault or data fault?

A single dark module on a working panel is nearly always a power or data fault upstream of the LEDs. Here is how to tell which, in ten minutes, before you swap anything.

22 September 2026

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Three disassembled moving head lights open for repair on a workbench, exposing internal circuit boards and wiring.

Lighting

Moving head overheating and resetting: time the failure

Thermal cutouts and mid show resets are usually a cleaning job rather than a board fault. Triage by timing, then set intervals per fixture.

15 September 2026

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ONE PANEL, EIGHT MODULES1231ONE PIXELA rework. One package, or its pad.2A CLUSTERUsually the driver behind them.3A WHOLE MODULEOften not the module. Look upstream.

Video

One LED module dark, rest of the panel fine: what's failed

A single tile blacked out while its neighbours play video. The fault is local to that module. How to prove it on the wall, and what we can repair at component level.

8 September 2026

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Close up of a CPS technician adjusting the pan and tilt gear drive inside an opened Robe moving head on the repair bench

Lighting

Moving head pan motor grinding: why it drifts and what we fix

Grinding, clunking or slow position drift in a moving head is usually the belt, bearing or home sensor rather than the motor. How to tell, and what we can put right.

1 September 2026

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ONE PANEL, EIGHT MODULES1231ONE PIXELA rework. One package, or its pad.2A CLUSTERUsually the driver behind them.3A WHOLE MODULEOften not the module. Look upstream.

Video

LED module dead cluster: what's failed and what we can fix

A block of pixels out on one module is almost never the LEDs. How to read the shape of the dark area, what we can rework, and when a module is genuinely scrap.

27 August 2026

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