Hi again,   thanks to Ilmenator and Shuriken my silly hardware issue is now resolved.  The second thing is a software issue.  The MB-6582 has all four cores stuffed but only 1 & 2 have SID's (8580's)   I managed to upload the setup_mb6582.hex package to the first core, which is now in perfect working order.  Reading thru the forum, I found that I must clone the firmware to the other cores (press menu on power up). It starts the cloning sequence and says on the LCD: Cloning Slave 01 Add