This is a popular question and the answer is no. It is not possible to precisely diagnose your unit with out taking the lid off or not even seeing it.

By the way, when we say we cannot provide you with a quote over the phone that also goes for email.  We have had many attached photo's of broken equipment, with what seems to now be a common phase"  Have a look at the attached photo, i think that bit is broken,not sure how much to fix ? "