你好！
信号
signal 英[ˈsɪgnəl] 美[ˈsɪɡnəl]
n. 信号，暗号; 预兆，征象; 动机; 导火线;
vt. 向…发信号; 用动作（手势）示意; 以信号告知;
vi. 发信号;
[例句]Kurdish leaders saw the visit as an important signal of support
库尔德领导人将这次访问视作一种表示支持的重要信号。
signal
英['sɪɡnəl]
美[ˈsɪɡnəl]
n.
信号，暗号;预兆，征象;动机;导火线
vt.
向…发信号;用动作（手势）示意;
vi.
发信号
[例句]The problem is the signal being sent.
问题在于目前所传出的信号。
NO SIGNAL 是显示器检测没有信号的意思。
你先去看一下显示器和显卡之间的数据线有没有连接紧密。
再重新启动进行进一步判断。
1. anything that serves to indicate, warn, direct, command, or the like, as a light, a gesture, an act, etc.: a traffic signal; a signal to leave.
2. anything agreed upon or understood as the occasion for concerted action.
3. an act, event, or the like that causes or incites some action: The unjust execution was the signal for revolt.
4. a token; indication.
5. Electronics. an electrical quantity or effect, as current, voltage, or electromagnetic waves, that can be varied in such a way as to convey information.
6. Cards. a play that reveals to one's partner a wish that he or she continue or discontinue the suit led.
–adjective 7. serving as a signal; used in signaling: a signal flag.
8. unusual; notable; outstanding: a signal exploit.
–verb (used with object)
9. to make a signal to.
10. to communicate or make known by a signal.
–verb (used without object)
11. to make communication by a signal or signals.
no signal.. 1. 无信号No Signal（无信号）：没有在任何信道上检测到无线电信号。h50176.www5.hp.com- 基于169个网页 2. 没有信号...CPU、显卡外的所有板卡，屏幕还是不亮，拨掉显示器与主机的信号连线，显示器中间亮了，出了彩色矩形块，提示No Signal(没有信号)，这说明显示器是好的，再晕S到100%！一气之下，丢下不管了。 www.coolflute.net- 基于8个网页 3. 没信号...5日，得知高清信号在该星上试播10967 H 28796 ，马上在430上输入该参数，没想到430XP反映这么迅速，立刻显示No signal（没信号）,试着小改参数，还是那个英文，看来纯高清的节目430音频也下不来。没戏，138艺华没戏，132也没戏。 www.tv88.cn- 基于7个网页 4. 无讯号...就系部机原本好地地，但系一开任何game，大约玩1、2分钟到，个画面就会停晒或者黑左，然后个mon就变橙灯，弹句无讯号(NO SIGNAL)出黎……