ACER Aspire Series 4551 4741 4771 5741 No response after turning on the notebook. Specific performance power light is off, the fan does not rotate, no response laptop. The following are common causes and solutions.

1、check the power problem

      First of all, to see if the power is not plugged in or the plug is defective. If you use a laptop battery, plug it in and try again. Can boot, indicating that the laptop battery is damaged, you need to buy a new battery for notebook models. If you can not boot, it shows there may be a notebook computer's internal hardware failure or laptop boot key failure, take this case recommended maintenance.

2、check whether the key components are loose

       If this problem occurs after the computer is moved, the computer may be greatly shaken during the move. Causes the internal parts of the computer to loosen due to poor contact. Then only open the notebook, re-fasten the memory, graphics card, hard disk and other equipment.

3、three kinds of hardware damage caused the notebook can not be opened

Motherboard failure: Motherboard failure is also one of the main reasons why laptops cannot be started. It may be due to factors such as the liquid in the notebook, the damage of the notebook, and the damage of the motherboard itself.

       Circuit failure: In addition to the artificial water leading to the internal circuit short circuit, most laptops can not open the machine's failure. Both are problems with the protection of the isolated circuit and the failure of the boot circuit and the EC peripheral circuit. Sometimes the circuit is burned to a large extent.

       BGA failure: BGA failure is also one of the reasons why laptops can't be switched on. This is very common in notebooks using DBM as Southbridge chip in the fast-generation generation.

       Solution: The above three kinds of hardware are damaged, need the specialized maintenance personnel to carry on the repair, let the professional person carry on the systematic examination to your notebook computer, eliminates the breakdown one by one.