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笔者在多次检修各种类型彩显故障的实践中，发现造成显示器无光栅故障的原因一般只有4种情况：（1）自动消磁电路短路造成交流输入电路保险丝烧断开路，交流加不到开关电源中；（2）开关电源电路中元器件损坏，使开关电源不工作；（3）行振荡电路有故障；（4）显像管及相应电路
The author repeatedly repair various types of color display in the failure of the practice and found that the cause of the monitor without grating failure generally only four kinds of situations: (1) automatic degaussing circuit caused by short circuit AC input circuit fuse blowing open, the exchange can not increase Switching power supply; (2) switching power supply circuit components in the damage, the switching power supply does not work; (3) the line oscillation circuit failure; (4) CRT and the corresponding circuit