Inaccurate clock time is the greatest possible quartz crystal performance is poor, to repair quartz electronic watch to buy back a replacement can usually solve the problem, welding pay attention to the soldering iron end ground or unplug the soldering iron power, so as not to hurt the motherboard due to static electricity. There are also individual computer startup timing is normal, shutdown stop timing, the cause of this fault is due to the timing circuit of the power supply voltage is insufficient, the power supply circuit is open or there is a slight short circuit phenomenon, such fault inspection and maintenance has a certain difficulty, it is best to ask professionals to deal with.