Malformed UTF8 characters

I have a PHP script which is trying to convert a recordset to a json object, but its returning error 5 (which after some googling says its a utf8 error). As the records were imported I wanted to check which records have the issue and then correct them, so I wrote the following query to see which recrods are wrong(when I say wrong, I mean not supported by the UTF8 conversion):-

Select `Title`, Convert(`Title` USING utf8), if(`Title`,Convert(`Title` using utf8),0,1) as 'issue' from `myTable` having 'issue'=1;

Select allOpen in new window

So, the idea is to look at the `Title` and also the `Title` using utf8 and if they are different display - Problem is there isnt anything outputted, so Im a bit confused.

Any ideas?