Symptoms
- Power/standby light blinks in a repeating pattern
- TV doesn't respond to power button while blinking
- Blinking continues even after unplugging and replugging
- Pattern seems consistent (same number of blinks each cycle)
Likely causes
- CommonPower supply fault reported via a diagnostic blink codeMany TV brands use blink patterns to indicate specific internal faults, most often power-related.
- CommonBacklight failure reported via blink codeSome manufacturers use a distinct blink count specifically for backlight circuit failures.
- PossibleMain board failureA failed main board can also trigger a blink code depending on the brand's diagnostic system.
What to do
- Count the number of blinks in one repeating cycle and note any pause pattern (for example, 3 blinks, pause, repeat).
- Search your TV's exact brand and model along with 'blink code' or 'error light' to find the manufacturer's specific meaning.
- Unplug the TV for at least 60 seconds to see if the blinking pattern resets or changes.
- Check the manufacturer's support site, since many publish an official blink code chart for their models.
- Write down the blink count and pattern to give to a repair technician, which speeds up diagnosis significantly.
- Avoid repeatedly power cycling if the blink code indicates a serious fault, since this can worsen certain failures.
Tools and parts
TV power supply boardSearch: “TV power supply board replacement for model”
When to call a pro
A blink code almost always points to a specific internal fault; give the exact blink pattern to a repair technician to speed up diagnosis.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.