It's not really clear which LED's are lit as lots of them light up, before all switching off.
Wondering which tests can be done by a process of elimination in order to rule out the faults?
Considering that the LV test points all appear to be good, testing the HV section might not be a bad idea, 'if' my testers can handle it?
Checking the A5 board waveforms and voltages must surely be worth a go too...
My main issue is time. Hence my writing here instead of reading every page of the 323 page Service Manual several times
James55