How to deal with the failure of industrial all-in-one computer?

1, observation and inspection method: observation and inspection method refers to the appearance of the industrial all-in-one computer by observing whether the components are abnormal to check the failure of the method, maintenance, in turn, to observe the industrial motherboard capacitors whether bulging, leakage or serious damage, resistors, capacitor pins whether the collision, whether the surface is burnt, the surface of the chip whether the surface is cracked, whether the copper foil is burnt, check whether all the plug and socket is askew, check whether the] owners of the board Whether there is a foreign object falling between the components; check whether the chip is abnormally hot, find out the cause of the failure to repair.
2、Comparison method:Comparison method is a simple and easy maintenance method, repair, prepare and so industrial all-in-one computer with the same type of computer. When some modules are in doubt, test the same test points of two industrial one t machines respectively, and compare them with the correct characteristic waveforms or voltages of the main board of the so hustle), to see which module's waveforms or voltages are inconsistent, and then check the inconsistent parts point by point until you find the fault and solve it.
3、Measurement methods.
(1) electric positive measurement method; by measuring the resistance value, roughly determine the computer chip and electronic components of the industrial all-in-one machine is good or bad, to determine the serious short circuit and open circuit. For example, using a diode to measure whether the most body tube has a serious short circuit or open circuit, or measure the resistance of the ISA slot to ground to determine the South Bridge chip.
(2) voltage measurement method: by measuring the voltage, and then compared with the normal test points of the industrial all-in-one machine, to find out the difference between the test points, and finally along the lines of the test points (running circuit), to find out the fault components, troubleshooting.
4, replacement method:Replacement method is to replace the suspected damaged components with good ones. If the fault disappears, the suspicion is correct, otherwise it is a misjudgment, to further check the judgment
5, heating and cooling method: heating and cooling method is mainly for a part of the thermal stability of industrial control machine failure caused by bad, when the suspected parts of the temperature rises abnormally and can be detected, the use of cooling methods to force its cooling. If the noise disappears or has a tendency to reduce, you can judge the parts of the heat, when the noise occurs in a long time after the power supply, or with the seasonal changes, through the warming of the suspected parts of the heating, if the failure occurs, it can be judged that its thermal stability is poor.
6, clean check method: clean check method applies to the complex working environment, suspected industrial all-in-one computer failure may be caused by dust. Clean, you can use a brush to lightly brush off the dust on the industrial all-in-one computer and motherboard. In addition, some cards and chips on the industrial motherboard are in the form of pins, which often lead to poor contact due to pin oxidation. You can use like a leather rub to remove the oxidized layer on the surface and re-stuff them.