On Sun, 18 Dec 2005 20:20:39 GMT, **THE-RFI-EMI-GUY**
put finger to keyboard and composed:

Another thought, maybe the CPU has a watchdog timer clocking from the
50Hz main supply, expecting some event after a certain interval, the CPU
is being forced to reset and not running the full program?

IME watchdog timers usually have a very short duration, of the order
of milliseconds (???). AFAIK their primary function is to reset the
CPU in the event of a firmware crash, thereby protecting the appliance
from damage, or the user from injury.

- Franc Zabkar
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