Morning all.
Think I can resolve this one.
The +15v bridge was over-heating due to U1846, The -8v bridge is overheating due to something on the A5 board. The +5v bridge I'm not yet sure, however there are still the odd situation, such as Q1284 and Q1286 are very hot.
Anyway, I think I should end this thread now, as the original 'power rail short' has been resolved. Not only can I now see the wood, I can now see some of the incricate carved detail upon that wood!
The entire situation arose because the +5v and -8v bridges were running hot and it was decided to upgrade them. And now the same problem remains (although the -8v should be straightforward). If I get stuck, I'll start a new thread.
I cannot thank everyone enough for all the time, support and guidance. There are gems of info in this thread.
Game-changers for me, were printing out the components diagram from the manual and separately colouring in each power rail and also printing out an enlarged +65v section.
I have learned that I need a finer voltmeter.
Maybe even 2 scopes :)
I gained my first experience with a dimbulb tester
I have learned to pay more attention when re-assembling
And not to turn on the scope after disconnecting components
James
James55