Aerial Signal and Humax box ?

[J4CKO]

My grandma has a Humax box and asked me to set it up, it worked but where she had decent signal strength on the telly, when the same aerial was in the box it managed BBC1 and 2 but said the signal wasnt good enough on the others ?

Tried tuning it using the auto tune feature to no avail ?

Does she need to get he aerial guy out ?

[J4CKO]

Popping round this weekend so will try the suggestions made, cheers all, will report back.