Apple tv will not boot have constant flashing white light
How to restart or reboot apple tv i have a constant flashing white light no picture tried unplugging power source and hdmi connected to a different tv same results
Apple TV 4K, tvOS 16
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If you see a continuously flashing status light, that indicates a failure to start up properly. First try a cold restart (disconnect from power for a minute or two). If that doesn’t improve it, then the system software may need to be re-installed, externally through a computer. Unfortunately, for the 4K model, users can’t do this themselves. Instead, contact Apple Support for assistance.
Restore your Apple TV - Apple Support
If you have an Apple TV 4K
If you […] see a black screen on your TV and flashing indicator light on the front of your Apple TV, contact Apple Support.