What is the reason why Coolby m 1 can't be turned on? Before the old card machine

Automatic shutdown of mobile phones can be divided into normal automatic shutdown and abnormal automatic shutdown.

The so-called normal automatic shutdown means that the electric energy has been exhausted, and the observed ICH value is basically lower than 10 (standby operation 000000*). Enter the engineering mode, and then enter the load control to see the ICH value representing the electric energy. Looking at the ICH value in engineering mode, we can see that the normal full charge is 92 or 93! This 92 is not 92% of the real power, which is understood as a sign of the battery use stage! 92-90 can be used for more than 1 day, 89-60 can be used for more than 1 day, and 59- 15 can be used for more than half a day. If it is lower than 10, it will be automatically turned off. In this case, automatic shutdown is normal.

However, if the battery is sufficient, but it is suddenly turned off automatically during use (especially during a call or when sending a text message), you will find that the battery is displayed as a symbol of sufficient battery after starting. This phenomenon belongs to abnormal shutdown, which also shows that everything is almost normal in standby. Once talking, texting, accessing GPRS and taking photos, it will automatically turn off, in other words, it will work normally when the current signal is weak and turn off immediately when the current is high. Many users have experienced sudden automatic shutdown for the following reasons:

1, leakage of mobile phone motherboard caused by excessive current. 2. The protection circuit in the lithium battery is too sensitive, and the power will be cut off when the current is high. 3. The battery itself is aging. 4. There is dirt on the metal sheet at the contact position of the battery, which leads to poor contact of the power supply. 5. The connection between the battery and the mobile phone is easy to loosen.

If the first two problems are found after inspection, if it is within the warranty period, go to KF. After the warranty period, find a reputable professional repair shop for repair. If the latter two problems are only because the battery metal sheet is dirty and oxidized, the situation will be improved as long as it is wiped clean with a glue stick. Putting paper or film between the battery and the mobile phone can also solve the problem of poor contact caused by loose battery.