开机后在自检的画面里,停在了Initializing USB Controllers..的地方就不能动了,屏幕提示: AMIBIOS(C)2003 A Megatrends.Inc. p4v88+BIOS p1.3 CPU:Intel(R)Pentium(R) 4 CPU 2.40GHz Speed:2.0GHZ Press F11 FOR bOOT mENU Single-Channel Memory Mode Initializing USB Controllers.... 按提示按F11没反应,键盘USB接口的,没亮灯,硬盘灯长亮。请问什么问题,如何解决啊?各位大侠救救我!!