2. Please check whether the data cable is normal. The data cable looks normal on the outside, but it may be broken inside. You can borrow someone else's data cable to see if you can charge it.
3. Check whether the original charger can work normally. You can use the USB port to connect the charger to other mobile phones to see if it works normally.
4. If you still can't charge after the above inspection, please try to plug it into the USB port of the computer to see if the computer can recognize the mobile phone. If you can, see if it is charging. If it is recognized, it is estimated that it needs maintenance.
If it cannot be identified and recharged, it must be repaired. If it can be identified and charged, please replace the data cable and charger with better quality.
5. See if the voltage is too low, or go directly to the maintenance station.
Extended data
Maintenance method of learning machine
1, pay attention to waterproof.
All electrical products have a common feature, that is, they can't enter water.
There are IC circuits, DC circuits, touch screens and housings in the learning machine, and the joints are not waterproof, so once the learning machine falls into the water, or the water is brought into the learning machine, it is possible that the water will fall into the circuit board, causing short circuit and leakage between IC pins. Once the electricity leaks, the learning machine will have abnormal sound.
2. Pay attention to the weight of hard objects
The shell of the learning machine is all plastic products. If you hit the shell with a hard object, it is likely to scratch or break the shell. In severe cases, the circuit board will be damaged, unable to work normally, or parts will fall off and make abnormal noise when shaking.
3. Please turn off the power before inserting the SD card.
Usually, if you want to insert an SD card, you should turn off the power first, insert the SD card and then turn on the power. Although the SD card has the function of hot plug, sometimes the SD card is damaged due to the friction between the copper sheet of the SD card and the copper sheet of the learning machine or the instantaneous power failure, and the contents of the SD card cannot be read.
Therefore, plugging in and then turning on the power supply can avoid these problems, thus prolonging the service life of the SD card.
If you don't use it for a long time, please take out the battery.
If you don't use the learning machine for a long time, you have to remove the battery. Battery for learning machine. There will be leakage when not used for a long time, so it will be safer to take out the battery, otherwise the leakage will easily cause abnormal sound.
Don't wait until the battery is dead before recharging.
Generally, we all have an idea that it is better to discharge the battery of the learning machine and then recharge it. This idea was correct in the past, because most of the rechargeable batteries we used in the past were nickel-hydrogen (NiH) batteries, which had the so-called memory effect. If they were not discharged and charged, the battery life would be rapidly reduced.
However, most learning machines now use lithium batteries, which have no memory effect. If the battery is completely used up before recharging, the chemicals inside the lithium battery will not react and the service life will be shortened.
The best way is to charge it when you have nothing to do, and keep it in the best full state anytime and anywhere, so that your battery can last for a long time.
Learning machines pay more attention to the application of learning resources and teaching strategies than other mobile terminals. Since the second half of 2005, synchronous classroom guidance, general assisted learning, multilingual learning, standard professional dictionaries, free expansion of memory and other functions have become the mainstream competitive means of learning machines.
More and more learning machine products are fully compatible with various modes, such as online learning, situational learning, portable learning machine foreign teachers, word associative memory, synchronous textbook explanation, interactive true question bank, authoritative dictionary, online library and so on. And the free expansion function of large memory and SD/MMC card memory.
Many brands have developed their own innovative learning models, such as "great synchronization", "great study tour" and "university search" series models created by excellent schools. I believe there will be more and more learning modes for students to choose from.
References:
Baidu encyclopedia-learning machine