n we can disassemble the laptop disk, pull and plug the disk connection adapter again to test, besides, to check up the disk interface adapter carefully, whether there’s damage or crack, when necessary, we can change the disk interface adapter to check up; here what you need to pay attention to is that there is one to two screws fastening the bracket beside disk interface, you need to first remove them before disassembling. Be careful when you do this, if pin is broken, then it would be quite troublesome;
(3) Check up the connection between disk interface adapter and motherboard
a) Check up the connection between disk interface adapter and motherboard, whether it’s too loose or not in right position; and then start it up, after powering on, put your ear close to the disk and listen the sound. If there’s any abnormal sound, or you cannot hear disk rotation sound, then you need to change in time;
b) Check up the disk interface on motherboard with a magnifier closely, whether there’s any break or crack;
c) Change a power adapter with a little bigger power function and try again;
(4) If CMOS battery voltage is too lower or abated, then probably some problems may occur like hardware could not be recognized and so on. Therefore, it’s quite necessary to make sure that the laptop CMOS battery voltage is accurate.