多媒体课室常见故障分析（Analysis of common faults in multimedia classrooms）.doc

多媒体课室常见故障分析（Analysis of common faults in multimedia classrooms） A projector, no signal No image is displayed on the screen. First check the projector power, check whether the power projector is open, even if it is not connected to the power supply can not open the projector, projector remote control or power switch, should also pay attention to whether there is open. If the projector has been opened but still not bright lights, to check whether the work of projector. This year, in order to reduce some unnecessary trouble, such as the remote control battery, remote control is not sensitive for other reasons, the construction of new multimedia classrooms installed in the simple control class after the power is switched on, just press the panel to boot. Two, the projector after no signal input There are several situations: one is the boot after the stay in the four small screen, this is because SHARP projector on a non normal shutdown (bulb not fully cooling put power cut off) a protection case. If this problem occurs, the best way is to please management. The two is not to switch the signal, in addition to the control buttons not according to relevant instructions in summary, there is no switching output signal of notebook, general notebook computer external display device, there are 3 kinds of display output control mode: notebook LCD display, external display device (here refers to the projector) do not display; or notebook LCD screen does not display, external display device and display; notebook LCD display, external display device display. In the control button confirm the correct case encountered projector does not show the situation, the user presses the keyboard function key combination notebook computer only (as the brand notebook and decide, for example teachers at hand using the function keys for Fn+F7 Founder notebook 14 inch, 12 inch Fn+F4 function keys to switch the video output or the taskbar) in the display properties settings icon display output contr