My a37 is showing "camera Error" on startup and is completely unusable.  It is about 4 years old and is mainly used for video work.  I'd like some advice on how to contact Sony to discuss a repair.  Given Sony's reputation for good quality, I'm disapointed that this camera has developed such a serious fault - I've owned much cheaper cameras that lasted much longer.  I would be grateful for any advice on how to contact Sony about this issue.

Many thanks