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Most LED screen faults can be recognised by their symptom: a dark area usually points to a power supply or receiving card, flicker to a cable or setting, and a line or wrong-coloured row to a module or ribbon cable. The table below lists the most common symptoms, likely causes and the first checks you can do yourself. The final diagnosis is made on site by measurement; besides LED screens, ARLEDSCREEN also repairs LCD advertising displays, kiosks and menu boards.
Short answer: Most LED screen faults can be recognised by their symptom: a dark area usually points to a power supply or receiving card, flicker to a cable or setting, and a line or wrong-coloured row to a module or ribbon cable. The final diagnosis is made on site by measurement.
If a cabinet-sized rectangle is dark, the cause is usually that cabinet's power supply or receiving card. If every cabinet after one point is dark, the data cable chain may be broken. If a single module is out, the module or its ribbon cable has failed.
Flicker usually comes from a loose data or power cable, a weakening power supply or receiving card settings; flicker seen only on camera is linked to a low refresh rate. Horizontal or vertical lines and a single row in the wrong colour (for example a row stuck red) usually come from the module driver IC, a ribbon cable or a receiving card port.
First check the breaker, the power line and the video source (PC or media player). On synchronous screens, the screen shows nothing when the PC is off. If these are fine, the sending card, power supplies or software settings need checking.
Outdoors, worn gaskets let moisture in, causing oxidised modules and dark patches. Lightning and power surges mostly damage power supplies, receiving cards and connections. Have the screen checked before switching it on again to avoid further damage.
On LCD advertising displays, touch kiosks and digital menu boards the most common symptoms are no picture, an unresponsive touch screen, power board failures and connection problems. Send the brand and model with a photo or video of the fault; we will make a remote pre-diagnosis and plan the survey.
| Symptom | Likely cause | First check | Who |
|---|---|---|---|
| Cabinet-sized dark area | Power supply or receiving card | Send a photo | Technician |
| Everything after one point is dark | Data cable chain | Cable connections | Technician |
| Single module out | Module or ribbon cable | Send a photo | Technician |
| Flicker | Loose cable, power supply, card settings | Send a video | Technician |
| Line or a row stuck red | Driver IC, ribbon cable, card port | Send a photo | Technician |
| Screen will not turn on | Breaker, power, source, sending card | Breaker and video source | You |
Restarting is not a lasting fix. Take a photo of the dark area and send it to +90 530 507 88 34 on WhatsApp. Cabinet-sized dark areas usually come from a power supply or receiving card and are fixed by replacing the part.
We do not publish fixed repair prices; the cause and parts differ on every job. The price is given in a written quote after pre-diagnosis and survey.
It depends on use. On outdoor screens, regular checks of gaskets, cables and connections reduce moisture faults. Maintenance scope and frequency are stated in the written quote; ARLEDSCREEN offers a 2-year warranty and 5 years of free technical service.
Yes. We repair LED screens, LCD advertising displays, kiosks and menu boards. For scrolling text signs, share the brand and control card and we will assess service and spare-part fit.
Send a photo or short video of the symptom on WhatsApp; we will make a remote pre-diagnosis and prepare the survey and repair quote.
Published USD prices for 12 panel models (e.g. P1.25 GOB 115.06 USD) are on our price list. VAT included; freight/installation excluded; no free shipping.
