hi not reallysoft start(!) is a 2 nand gate cmos set reset flipflip feeding the poweron lead of the power supply. it uses software logic 0 to turn off, and hard contact to gnd via the power on push button to turn on
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# The UK's cheapest Home Phone and Broadband bundle # The UK's cheapest Mobile tariffs # The UK's cheapest standard Gas and Electricity Or they will give you back Double the Difference! Charges, terms and conditions apply. For full details of the Utility Warehouse Price Promise see http://www.ucallusave.co.uk <http://www.ucallusave.co.uk> Intrigued? Call me John Ballance C.Eng MIET - jwb@xxxxxxxxxx - 07976 295923 On 24/07/2011 14:35, Tim Hill wrote:
In article<51f7c510d9mail@xxxxxxxxxxxxxxxxxxxxxx>, John <mail@xxxxxxxxxxxxxxxxxxxxxx> wrote: [Snip]It seems to keep coming back to the PSU: why, if power is on, does pushing the power button on the front not work? In fact, this morning I had to cycle the rear switch twice before it would come alive. Doesn't that suggest something to do with the PSU? Is Chris Evans reading and have a clue?I will be interested too. I have an old laptop which exhibited similar symptoms: would shut down mysteriously and not restart with soft switch. Whether battery or mains, whether shut down manually or not. Is there a way to bypass the soft start circuit altogether in an Iyonix by [bre|m]aking a link somewhere?