JENSEN 323 I need instructions on how to go about getting the code for this remote. I have tried all the solutions posted but nothing seems to work. If someone could help me that would be great Thank you

Here is some helpful information I found:
Without the code on JER-323:
1.Manually turn on the component you want the remote to control.
2. Press the device button, example:( TV) and the (power button) for 3 seconds until the (on/off button stays lit).
3. Once the (on/off) button is lit, press the (on/off) button until the unit (the TV or unit you are trying to control.) turns off.
4. When the code is located, press the (stop) button at the bottom to save the code. Here is some helpful information I found:
Without the code on JER-323:
1.Manually turn on the component you want the remote to control.
2. Press the device button, example:( TV) and the (power button) for 3 seconds until the (on/off button stays lit).
3. Once the (on/off) button is lit, press the (on/off) button until the unit (the TV or unit you are trying to control.) turns off.
4. When the code is located, press the (stop) button at the bottom to save the code.

my tv is olevia need the codes,someone can helpme my tv is olevia need the codes,someone can helpme