TV screen flashing different colours randomly
Screen flashing comes from a loose HDMI cable, a dying backlight, or interference from a nearby device. Start by checking and reseating every HDMI cable — push them in firmly and make sure they click. If that doesn't fix it and the TV is more than 5 years old, the backlight is likely failing.
When the display flashes colours or goes black, it's a sign that either the cable connection is loose, there's electrical interference, or the TV's internal display is starting to fail. A loose HDMI cable is the most common fix and takes 10 seconds. If every cable is tight and the TV is older, the backlight or display panel is wearing out.
Fix-IT-Bot will walk you through each step — just tap, no typing needed.
Skip — I just want a technicianCommon mistakes to avoid
- Only checking the HDMI cable on one end — make sure both connections click and are secure
- Not realizing that a cordless phone or router nearby can cause flashing — interference is overlooked
- Thinking the TV is broken when it just needs a cable replaced — bad cables are cheap to replace
Signs you need professional help
- Every HDMI cable is tight and there's no interference, but flashing still happens
- The screen is flashing and the TV is older than 5 years — it is time for repair
- The flashing is getting worse over time instead of better
Book a technician
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Can't fix it yourself?
Most issues are resolved remotely in 15 minutes. Weekend appointments only — no parts, no in-home visit needed.