Check timer or energy-saving settings: Some TVs have energy-saving or timer settings that might cause them to turn off automatically. Check and adjust these settings if necessary on your Detel DI43IPF18.
Ensure all cables are properly connected, especially if you are using external devices like game consoles or sound systems.
If the Detel DI43IPF18 turns off after being on for a while, it could be an overheating issue. Ensure there is enough ventilation around the TV.
Make sure the Detel DI43IPF18 is correctly plugged in and the outlet is working. You can test by plugging another device into the same outlet to check.