The main forum product section contains manuals for the BG4000 and also some training notes donated by a member who was a one time repair engineer who went on a training course and reatained the course notes…..these notes identify the abbreviations and are a very usefull guide…..they are available to silver members and above, take a look…..do you have a transistor tester available?…….seems like your machine is only a short way from being sorted…..
