How to tell the motherboard powered plc cpu modules

Now the cpu is usually powered by a 12V , the output voltage is based on the type of CPU and BIOS parameters are automatically set early with the jumper settings, this depends on the motherboard design. Voltage between 1-2v it. plc cpu modules notebook and some less than 1V. So: the input FET is 12V ( motherboard before 2005 are 5V, 3.3V power supply ) output and plc communication module  incentive side FET switching signal because it is the state , is the uncertainty of the multimeter ! CPU power supply module , an inductor with two capacitors is basically between 15W to 30W, with power divided by the current know how much voltage . Normal computer maintenance is not so troublesome , plc cpu modules that burned on another part of the same size on the line, pay attention to the voltage value on it. Almost all of the programmable logic controller plc  components is the capacitors on the motherboard burned up to the general power supply module is divided into : CPU power supply Northbridge , Southbridge power , graphics power , memory, power supply, sound card supply these parts , this is a good quality motherboard characteristics .
Generally these can be a lot of shrinking supply circuit . That is why the motherboard with some of your chips and some cheap main reason .
Feeding circuit all the way from the two capacitors, two inductors, a rectifier coil. General CPU power module you can count the plc industrial controller  number of capacitors arranged neatly near the CPU to determine a few phase supply. Others also generally be so judged .