Touching the cash register as a high-reliability product has a low probability of failure, but due to external power supply changes or external environmental changes, product failure may also result in hardware failure due to serious collision during transportation, but the hardware itself is faulty. Still less. Therefore, when the cash register system fails, the fault should be judged and eliminated according to the principle of “soft first, then hard, first outside and insideâ€.
1. First check if there is a problem with the system software or application software;
2. Check whether the external cable is connected correctly and the external device is normal. If the network is unreachable, check whether the network cable is normal and the switch is normal.
3. When determining the fault, an alternative method should be used, that is, normal equipment is used to eliminate various suspicious components. (For example, if the test cable is used, the normal device can be used to test whether the network cable is normal);
4. When a hardware failure occurs in the equipment (special power supply failure, odor or obvious abnormal sound), the power should be checked first. Only after eliminating various possible obvious causes (short circuit, burnt parts, etc.) can power check ;
5. When determining the host interface or peripheral failure, run the randomly provided check.exe test under pure dos;
6. Test keyboard port device should be carried out under pure dos.
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