Here are some things you can try if your TV won't turn on:

1. Check the connections: Make sure the power cord is securely connected to both the TV and the power outlet. Try plugging another device into the power outlet to make sure it is working properly.
2. Try the remote control: Make sure the remote has batteries and is pointed at the TV. Try pressing the power button on the remote several times.
3. Check the indicator light: If there is an indicator light on your TV, check to see if it is on or blinking. This may give you a clue as to the problem.
4. Unplug the TV: Unplug the TV for 30 seconds, then plug it back in. This may reset the TV and resolve the issue.
5. Look for a power button: Some TVs have a physical power button in addition to the remote. Look for one and try pressing it.
6. Check the converter: If you are using a converter, make sure it is properly connected and working.
7. Try other sources: If the TV is connected to multiple sources (like a DVD or game console), try turning it on with a different source.
8. Check the user guide: Refer to your TV's user manual. It may have additional troubleshooting tips.
9. Contact customer service: If none of these methods work, you may need to contact Hisense customer service or a TV technician.