You can access the self help guide on technical issues through NJOI Prepaid WhatsApp.
Step 1: Text Hi to the NJOI WhatsApp number (03 9543 8100)
Step 2: Type 4 for Technical Help
Step 3: Key in the error code on your TV screen or 1 if it is a blank screen
Step 4: Refer to the guide sent to resolve the issue
If the issue is not resolved, key-in 2 to talk to an agent.