Chris Chetty

A lot of errors can often be caused by dry and aged capacitors on the internal power supply circuits. Replace them and the unit can be returned to service. If the unit is more than 18 months old this is often the case especially if the error doesn't make sense in the installation. A quick check is to remove the cover and have a look at the top righthand side and see if any of the capacitors are swollen. Not a 100% guarantee that this isn't the problem if they are fine but if you see a swollen one you know its a problem.
As BRG stated it's mostly enthusiasts doing board level repairs. Errors that typically require major repair works and IMO probably don't justify the repair on an economic basis are:
09- bus soft start failed (usually battery mosfets, output IGBTs)
08 - bus voltage too high
32 - no coms between screen and main CPU (often damage to bus softstart circuit)
 

Let's hear from the Axpert/Kodak fundi. 
@BritishRacingGreen