Principles of hardware troubleshooting
When a computer fails, there are usually some telltale signs. For fault diagnosis, the following principles should be followed:
1. Check the external parts first, and then check the internal parts
For the failure of the host or display, check the switch, safety, socket outside the machine for open circuit, short circuit, etc., and confirm that the external components are normal before opening the chassis or display for inspection. After opening the chassis, first observe whether the plug and socket of the system board card are crooked, whether the resistance and capacitor pins collide, whether the surface is burnt, whether the chip surface is cracked, and whether the copper foil on the motherboard is burned; It is also necessary to check whether there is a foreign body falling into the components of the motherboard to cause a short circuit, you can also see whether there is a burnt discoloration on the board, whether the wiring (copper foil) on the printed circuit board is broken, and so on.
In addition, pay attention to distinguish whether there is a burnt smell in the host and the board, so as to find the fault and determine the location of the short circuit. At the same time, it is also necessary to monitor whether the working sound of the power fan, soft\/hard disk motor or seek mechanism, display transformer and other equipment is normal. In addition, when the system short-circuit fault is often accompanied by abnormal sound, monitoring can find some hidden dangers in time and help take measures in time when the accident occurs.
The rangefinder won't turn on
There are several possibilities for this:
one
The effect of temperature, such as too low temperature;
two
Battery power is low, the voltage is too low;
three
There was a problem with the instrument itself. You can check them all.
The distance measuring instrument crashes for a variety of reasons, just like a computer crashes, some because of the incompatibility, some because of the raw materials of the machine itself, most because of poor quality
The reasons for the failure and the steps are as follows:
Cause one, oscilloscope does not start.
Cause two, power failure caused by not boot.
Solution: There is an independent power module inside the rangefinder to supply power to the main board and each function module, so it is necessary to pay attention to power safety.
Pay attention to the problems that need to be paid attention to in use, divide the focus here, use the original oscilloscope power cord.
Check whether the battery is installed correctly and whether the battery is powered on, and press the switch.