785g主板启动困难，频繁黑屏，无响应

问：785g + X3 435 + 4870 + 2gt +战斧500。很难启动机常。After the Power key, the fan, CPU fan and hard disk have response, but the display is not input.If you turn off the machine and start again for more than ten seconds, you may be able to start the machine normally.This is the case when using both the set display and the use of the independent graphics card.In the process of using the irregular black screen, the keyboard does not respond; sometimes the picture will be stuck, the mouse and the keyboard have no response.Several official BIOS, motherboards and graphics cards have been reinstalled and unsolved.There is no replaceable main board and power supply on the hand.

答：这种情况或主板故障，或卡故障，其他硬件不太可能被损坏。但是，由于使用显示时间仍然是这样，它基本上可以是主板问题。启动起来很困难。可以肯定的是散热与否无关。应该是硬件损坏。有人建议用户更换主板。