I have managed to solve the issue but won't remove this question in case someone else is experiencing similar problems. This is what I have done that has worked for me
* Make sure display connector is clean and installed correctly
* Force restart phone
* Update IOS through settings (17.1.2, Apple said this will patch this issue)
* Try updating to public beta patch if regular does not work
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* Enter DPU mode and restore phone through itunes (My restore didn't want to download IOS firmware so I downloaded firmware latest firmware from 3utools (17.1.2 in this case). Left click on restore whilst holding shift on itunes to open folder with system file. Continue with process.
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* Enter DPU mode and restore phone through itunes (My restore didn't want to download IOS firmware so I downloaded latest firmware from 3utools (17.1.2 in this case). Left click on restore whilst holding shift on itunes to open folder with system file. Continue with process.
* Flash phone ***''(Only as a last resort and at your own risk)''*** I used 3utools
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***Always back up the device if you have important files/data before attempting***
What worked for me in the end was the DFU itunes restore with the 3utools firmware, which booted with the same problem. I then tested a few displays on the phone (all which gave the same issue). I then put the replacement screen back and restarted which suddenly solved the issue. No more screen burn and I'm not 100% on what solved it but I can share the process which may help someone 🙂
I have managed to solve the issue but won't remove this question in case someone else is experiencing similar problems. This is what I have done that has worked for me
* Make sure display connector is clean and installed correctly
* Force restart phone
* Update IOS through settings (17.1.2, Apple said this will patch this issue)
* Try updating to public beta patch if regular does not work
* Enter DPU mode and restore phone through itunes (My restore didn't want to download IOS firmware so I downloaded firmware latest firmware from 3utools (17.1.2 in this case). Left click on restore whilst holding shift on itunes to open folder with system file. Continue with process.
* Flash phone ***''(Only as a last resort and at your own risk)''*** I used 3utools
***Always back up the device if you have important files/data before attempting***
What worked for me in the end was the DFU itunes restore with the 3utools firmware, which booted with the same problem. I then tested a few displays on the phone (all which gave the same issue). I then put the replacement screen back and restarted which suddenly solved the issue. No more screen burn and I'm not 100% on what solved it but I can share the process which may help someone 🙂