Introduction to common pos cash register memory failure

What are the common pos cash register memory failures?

First, the memory is damaged, the memory alarm appears at boot

This kind of fault will often be encountered. Most of them are not the usual "beep" when they turn on the next day, but the "嘀, 嘀, 嘀..." sounds non-stop, the display does not respond. Most of the failures are caused by excessive humidity in the environment of the computer. During long-term use, the surface of the gold finger of the memory is oxidized, which increases the contact resistance between the gold finger and the memory slot, hinders current flow, and displays a memory self-test. error. It is expressed as a "squeaky" sound when it is turned on, which is what we usually call "memory alarm".

The processing method is also very simple, that is, remove the memory, use the eraser to carefully clean the gold fingers on both sides of the memory, and then insert it back into the memory slot.

Note: When scrubbing the gold finger, do not touch the gold finger directly with your hand, because the sweat on your hand will adhere to the gold finger. After a period of use, the gold finger will be oxidized again, and the same fault will occur repeatedly. However, there are several other reasons for this type of memory alarm:

1. Memory and motherboard compatibility is not good

Plug the memory into other motherboards, and it will be stable and reliable for a long time. Plugging other memory into the faulty motherboard also runs reliably and stably, and no alarm appears. But when you put the two together, there will be an alarm of "嘀嘀". This type of failure can only be solved by replacing the memory.

2. The motherboard's memory slot is of poor quality.

It is manifested that the alarm sound of “嘀嘀” appears when replacing multiple brands of memory. Occasionally, there is a certain memory that does not alarm, but it may alarm after shutdown and restart. The main cause of such failures is on the low-end motherboards of two or three hundred dollars. The reason is that the price of the motherboard is low, and the quality of the memory slots used is also poor. Only the motherboard can be replaced.

3. Memory chip failure

Such a fault is relatively serious. The host can find that the memory has an error defect during the power-on self-test, and cannot pass the self-test, and sends a “嘀嘀” alarm sound to prompt the user to check the memory. This type of fault requires the memory to be plugged into other hosts to check for the same "click" sound. If there is, you can conclude that there is a problem with the memory; if not, it may belong to the first or every two reasons above.

4. Memory alarm caused by other faults

This kind of fault is not common. It may be a motherboard fault or a CPU fault, causing a memory alarm. It can only be replaced one by one by the exclusion method.

Second, memory corruption causes the system to report registry errors frequently

This kind of fault is more common, which means that the system can be started normally. However, when entering the desktop, the system will prompt the registry to read the error. You need to restart the computer to fix the error, but after starting the computer again, it is still the same fault. For such problems, we can enter safe mode, type "MSCONFIG" command in the run, remove the "V" in front of the ScanRegistry in the "Start" item, and then restart the computer. If the fault is eliminated, the problem is really caused by the registry error; if the fault persists, basically it can be concluded that there is a problem with the memory of the machine. In this case, you need to use the replacement method and replace it with a good memory. The same failure.

Sometimes, if you do not perform disk defragmentation for a long time, if you do not perform error checking, it will also cause a system error and prompt a registry error. However, for such problems, after running "ScanRegistry", the system will run normally, but the speed will be Significantly slower. For such problems, the best way to solve this problem is to back up important information and then reinstall WIN98.

Third, the memory is damaged, the installation system prompts to extract the file error.

This kind of fault is common in the process of installing the system and will often exit the installation accidentally. In fact, this is often caused by poor quality of memory or poor stability. Most problems are solved after replacing the memory. This type of problem can occur with the same prompt whether you install directly from the CD or from the hard drive. Although it is similar to the problem that we can't read a file properly when installing WIN98, WIN2K and XP, please select "Ignore, Terminate, Abandon", but most of the problems are due to the poor quality of the CD or the use time of the CD-ROM drive. After a long time, the performance of the reading disk is degraded, and at the same time, the optical drive light flashes slowly, accompanied by the "click" sound when the disk is intermittently read. If we encounter this problem during the repair of a computer failure, it is best to replace the memory test directly to see if the same fault still occurs. If the fault disappears, it means that there is a problem with the original memory; if the fault persists, most of them are caused by poor quality of the disc or the disc drive is lost, or the system installation file on the hard disk may be damaged.

Fourth, the memory short circuit caused the host can not power

In this case, the memory damage is more serious, but the surface of the memory chip, the gold finger and the resistance capacity do not necessarily have obvious burning marks, and sometimes they are exactly the same as the intact memory stick. However, after inserting this memory into the motherboard, the motherboard cannot be powered. When the power is plugged into the power plug, press the power switch, the host does not respond, the CPU fan and the power fan do not work, the power indicator does not light, and it is exactly the same when there is no power. The identification of the fault is also very simple, using the exclusion method and the minimum system method. If you encounter a failure of this type of host, the first step is to troubleshoot the power supply. If there is another normal power supply in your hand, replace it directly. If not, remove the power supply, short-circuit the green and black wires directly with the wires, observe if the power supply fan is working, and listen carefully to the inside of the power supply for any abnormal noise. If there is a problem with the power supply, the quality is unstable and needs to be replaced. The second step is to remove the sound card, modem, hard drive, optical drive, floppy drive, graphics card, memory, CPU, leaving only the CPU fan, then insert the DEBUG card (if not, then you need to observe whether the CPU fan and power fan are rotating), start Power on the motherboard, observe whether the indicator and digital tube of the DEBUG card have instructions; then insert the CPU and power on the test machine; then insert the memory and add other parts step by step. If the above failure occurs when you arrive at a certain part, it means that the part is defective and needs to be replaced or repaired. This method is also suitable for troubleshooting slow system startup, crashes, etc.