Exasperated trying to repair digitiser on my OSF!

[Guest jdcampbell]

My son broke his touchscreen digitiser and so I bought a replacement from eBay. It worked initially but stopped working very soon afterwards. I tried a replacement from the same supplier and that did not work at all.

 

Putting the broken digitiser back on worked, so I put this down to the eBay digitisers being of poor quality.

 

I subsequently bought a non working OSF with a good original digitiser. I fitted it and tested it before reassembling. It worked. Then I reassembled the phone and it didn't work.

 

Putting the old broken digitiser back on it works every time, but whatever I try the unbroken replacement no longer works at all. I am exasperated!!

 

Any ideas if I could be missing something?

 

My OSF is an original OLED one - is it possible that the spare digitisers Ihave been getting are from the later TFT version and that fitting them causes a failure? That seems unlikely to me but I am incredibly frustrated trying to get this resolved.