The visual assessment technique ensures that as soon as the check performs unusually, a lot of the difficulty phenomena may be seen through the keep an eye on for example the display screen (including rose display, coloration dilemma, and so forth.). This involves very careful viewing, evaluation and analysis, then proceed to the difficult, get rid of the fake and help save the reality, lastly learn the actual dilemma component until the thing is wiped out. small lcd screens，The graphic assessment method mainly includes three types of outside evaluation, inner evaluation and strength-on examination.

External assessment: Look at the exhibit problem initially externally. In accordance with the doing work setting in the device, check regardless of if the switches and switches on the operation board are normal, if the energy interconnection is well linked, and whether the video clip transmission line is attached normally, etc.

Inside evaluation: If no abnormality can be found in the exterior evaluation, disassemble the screen case and look the interior circuit. Notice if the solder joint parts in the elements, the linking cables are soldered, desoldered, regardless of if the pins are moldy or broken, whether the plug-ins are reduce, whether or not the circuit collections from the published circuit board are broken, whether or not the components are burned, broken or problem, etc. .

Power-on assessment: Turn on the energy move and discover whether the power signal light-weight is on, and whether there is certainly fireplace, heat, burned odor and smoke inside the machine.

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