StTDenistone

At last, an Australian example of this battery drainage fault in a THH12 purchased in September 2015. Ours was drawing current of 80mA after switch-off. I delivered it to the Australian distributor/service agent who replaced the mainboard and had it ready for pickup by the following business day. Thanks to Damien from the Australis Music Group. Thanks also to rborsey for the helpful analysis and narrative earlier in this forum topic. Australis had seen this fault only once before, but found it again in a new unit which they pulled from stock for comparison with ours. Nevertheless, not a common fault. I now look forward to using this excellent bit of gear on a regular basis.