Instructions on the use and maintenance of CMOS

This phenomenon occurs especially in older computers. The main reason is that the backup battery on the motherboard is used for a long time, the voltage is low, and needs to be replaced. However, if the CMOS power failure often occurs on a new battery machine, you need to consider whether the circuit on the motherboard is faulty. Generally, pay attention to the following points:

1. When replacing the motherboard battery, it is necessary to select a good quality battery (such as Maxell cr2032 ). Otherwise, the battery will often become unavailable after several months due to poor battery quality or excessive discharge caused by long-term storage of battery. If the quality of the battery is good, but the use time is not long, there will be a CMOS power failure, it may be that there is a problem with the circuit on the motherboard, You Need To timely repair the motherboard.

2. When changing the battery, check whether the original battery has liquid leakage. If there is liquid leakage, thoroughly clean the liquid leakage on the motherboard to reduce the damage caused by circuit corrosion. If it is a newly purchased machine, in addition to the Battery problem, you should also consider the motherboard problem and some plug-in card coordination issues and other factors, it is best to promptly contact the company selling the computer to solve.

3. If you need to solve the circuit problem yourself, you can check whether the resistance or Diode of the battery circuit on the motherboard is damaged, whether the capacitor leaks, and whether the Jumper settings of the battery are correct. If the quality of the integrated circuit on the motherboard is determined to be faulty, you can use an external battery to solve the problem.

The method is: Use a 6 V laminated battery or install a 2 ~ The battery boxes of the 4th battery are attached to the external battery connectors on the motherboard. Pay attention to the positive and negative mark in the motherboard specification. Do not pick up the error. For safety, you can concatenate A 50Ω small resistor in the battery circuit (front end. Battery connectors can be bought at computer companies or electronic accessory stores. Because these batteries have powerful power supply capabilities, they can usually take a long time. However, they should use green batteries with no liquid leakage, and place the battery boxes in a safe location in the machine, avoid damage to the device due to battery leakage.

A cmos error is a headache, and many machines usually fail because they do not pay attention to it. Therefore, it is necessary to regularly maintain CMOS.