Its not always possible for a code to be created for a TV, firstly are you using the website here to find the list of codes for your remote?
Secondly which model of Sky Box do you have, as you will find the modern TV's will only work with the modern remotes, since the codes need to be built into the boxes, so as new TV's get created which require new codes these are added to new releases of sky boxes.
Can you confirm you have tried the following codes:
Sky Q - 1664, 0678 and 1678
SKy HD v9 or 10 - 1664, 0678 and 2505
I just wanted to follow up and check if you required any further assistance?
I havent heard from you in a few days, and I just wanted to follow up and check if you required any further assistance?