A one off fault, while leaving you with a lack of trust of your equipment could be just that - a one off. It may never occur again, and the chances of a repair centre (no matter how skilled) of finding anything are minimal.
An intermittent fault is much more serious from your point of view, but similarly speaking there's no guarantee a repair centre will pick it up, even with someone testing it full time for weeks on end.
The only types of repair which are likely to be solved are either persistent faults, or intermittent faults which you've managed to work out exactly what conditions invoke the failure.
In other words, if you don't get the error again, leave it.