Checks / troubleshooting:
1. Check the connection of Head FFC.
2. Head FFC may be damaged.
3. Check the connection of CR FFC.
4. CR FFC may be damaged.
5. MAIN board may damaged.
6. Head thermistor may be damaged.
1. Head FFC may be damaged.
2. CR FFC may be damaged.
3. Print head may be damaged.

Recommended actions:
Securely connect Head FFC.
Replace Head FFC.