Post by Iknow
try to unplug your memory, clean it, and plug it back.Make sure it is working.
By the way, you may not preclude the possibility of power just base on the lights. Check it if you have necessary devices.
I KNOW:
你真是高人啊,很有针对性的指出了问题的所在,我把Memory card拔出清洁装好后电脑就恢复正常运行了,真是高兴,谢谢!谢谢!