Hi, thanks for the replies and feedback, I have re fitted the faulty SE screens in 5s phones and they have worked fine, so it was 100% the screens fault. I contacted my supplier and the said they should work, they contacted their supplier and was told there was a mistake and send a new batch out. The new batches have been working fine ever since, however the 2 SE phones that had the fuzzy screen problem never worked again so it must damage something on the board. So, SE compatible screens DO work but be careful, if it goes fuzzy, remove straight away to avoid damage!