A laptop has a non-functioning keyboard. After the keyboard was replaced with a known good one, the technician finds that the keyboard still is not functioning. Which of the following steps should the technician take NEXT?（）
- A、Replace the motherboard.
- B、Check all connections.
- C、Replace the USB controller.
- D、Check the PS/2 connector.
正确答案:B
答案解析:有
微信扫一扫手机做题