Hi.
We are having a problem with a customer and one of our devices that must be solved as soon as in about a week.
Problem #1: he is on the other side of the world so we can't go there.
Yes you can,they have these wonderful new devices called aeroplanes!
Seriously,though,if it is that urgent,& the customer is worth keeping,send someone with the right equipment ,or find a third party in his country who can do the testing.
As someone "on the other side of the world" I have been on the receiving side of the reluctance of people in EU to move out of their comfort zone.
Buying parts for Picture Monitor repair is one example:
Sony:"OK.it will be on the next airfreight".
Barco: "We'll put it in the next container going to Australia ".
(No they didn't
really say that,but it's what it amounted to}