electrical gremlin should be straightforward to fix
oh yeah?... your mate told you that did he... just before you gave hime the dosh no doubt?..

Well, lets hope so... you're in the right place for support, should you need a nice colour circuit diagram i have it on file, and can email it to you (4 a4 pages you need to stick together once printed)... and i think there's someone here who has the service manual on cd (i did have a copy, but in my usual fashion it's disappeared... i'm sure there's someone near me quietly building an srx with all the bits i can't find in my garage)
anyway, welcome to the coven known as 'The Thumper Club' you don't by any chance live in the East or South East?... or are you in the West where the strange and secretive members of TC only come out at night to dabble in the black arts of old camping stoves, tilley lamps and land rovers.... be warned.

pip pip