We have a workstation machine which, for the past three days, shuts down (apparently) randomly. After it shuts down, if you press the power button, the machine won't start. However, if you pull out the power plug from the wall socket end, again put it back in, and then power-on the machine, it would start. Nothing else, but this action, would make it start.
The machine is connected to the wall power socket, through a Belkin spike protector strip. The wall power socket is connected to a common 10 kVa UPS. Other machines running in similar setups are working fine.
I have changed the machine's power cable and the spike protector strip. Same situation continues. The machine runs Windows XP SP3. The machine is not connected to the internet and is used to run a Windows application over the LAN (which is not connected to the Internet too.)
Other specs of the machine :
Before I open the machine and check with RAM or SMPS, I wish to know what could possibly be the issue and how it is caused ?
This is not the first time I am facing this issue, though I don't remember the cause or solution from years back. :-)
Other possibly related context :
The monitor connected to the machine has these wavy forms possibly related to power. The wavy pattern is somewhat noticeable, but not hampering work by the tolerant user :-) . Another monitor connected to the same machine also had the same issue. Changing refresh rates didn't have any positive change in the issue.