1. When I used the laptop with the AC adapter plugging into the outlet, the AC adapter is very hot to some extent, and the battery seems to lose its capacity of the power, the laptop just can run just a short time while with the battery. Why?
Professional said:
It is a little difficult to identify the problem. First of all, you might make sure that is the battery or others resulted in the hot laptop. You can try to charge your laptop just with the AC adapter and see the result, if the laptop didn’t become cool; it means that there are other things you should check.
If your adapter is not original, you should make sure that your adapter is right or not according to the voltage of the adapter, which is better equivalent to or higher to your original adapter voltage or not. If it is lower, the laptop can not be charged adequately. This may be the reason.
2. Laptop receiving power and battery is being charged normally while the laptop turns off after a few seconds.
Professional said:
The common reason for this problem is that the adapter is out of work; you can test it with a new AC adapter in good quality and see the laptop can work well or not. If the laptop is still in the same condition, the problem may be related to the motherboard.
3. When I want to choose a new adapter, what should I notice?
Professional said:
When you want to buy a new adapter, you had better choose an adapter with same voltage, while the amperage can not be lower than that of your original adapter. For example, if you laptop has no light when you use your laptop with AC adapter, the reason may be what is talked above. This reason can also explain the problem that the battery for laptop can not be recognizing when your laptop is turned on.
4. Laptop only can be charged when the port is wagged, and there is no connecting to the power cord.
Professional said:
This may be resulted from the bad power adapter or the power jack. In this case, you can test your laptop with a new and working power adapter, if your laptop can be charged with the new power adapter; the problem is that your old power adapter is out of work, you should replace it. You also can test the old power adapter with a voltmeter. It may be because that the wires inside the power cord are out of work and when you wag the power plug, the wires get contact.
While, if both your old and new power adapter can not fix the problem, you may take the power jack into consideration. The power jack may be failed. In this case, for some laptop, the jack is soldered to the motherboard, so you have to replace the motherboard; there are also some laptops in which the power jack can be separated from the motherboard.
5: The laptop can not be charged with AC adapter and the battery can not be charged too no matter I wave the power cable or move the cord position.
Professional said:
This case may also be related to the problem of the power jack, of course, you have better make sure your AC adapter is in good condition or not. The test method can be the same as the case 4. The power jack maybe not connects well or it is failed. You may have to replace the motherboard.