On Nov 19, 9:34 am, [email protected] (Janner) wrote:
> All the 'wake on ...' settings have previously been disabled in the bios.
> When these rogue 'reboots' occur there is no text displayed (certainly
> no sign of any bios messages). The system fans operate and the
> power light on the front of the case is on. Apart from that, there is no
> indication that the PC is trying to restart.
Reasons for this anomaly to exist are too long. Without some facts,
every reply will be speculation. Palindrome has defined the
relationship between a power supply and power supply controller.
Until you see that relationship, well, every further reply will only
be 'it might be this or could be that'. Such replies provide you with
no clear plan of action.
To understand what is going on, get a multimeter sold in any store
where hammers are sold - and for about the same price. Useful replies
will occur if you monitor what happens on the purple, green, and gray
wires from power supply; before, when, and after shutdown occurs. Also
useful would be numbers from any orange and red wire.
Not only will the problem be identified. You will also learn what
happens between the various components of a power supply system.