[iyonix-support] Re: 516 and the Network Chip Problem

On 1 Feb 2010, David Pitt wrote:
  

John M Ward <john@xxxxxxxxxxxxxx> wrote:

    

<snip>I suspect that the problem is that the PSU voltages do not fal off to

zero volts until the machine has been left powered off for a while.

I suspect that, because the PSU voltage has not fallen to zero, it is 
holding some bit(s) at '1' which is preventing a proper cold-power up 
reset.

If my Iyonix crashes, sometimes the rest button never works, no matter 
how many times I try it. Switching off at the back, and then back on 
again after only a few seconds does not allow a proper power on reset, 
for the reason outlined above, unless I wait 3 mins or so before 
powering up again.

As I say, I suspect the 3 mins is the required time for the PSU 
(especially for the beefier higher power PSUs now supplied as 
replacements)  to fully discharge, and thus affect a cold-power-on.