Sea-televisionMost of the problems with black screens but power lights were not damage to the screen itself and there was no immediate need to conclude that the television was dead. It's a phenomenon with multiple possibilities, from simple signal sources to specificHardware failureBoth (e. G. Backlight systems) are possible. Through systematic self-examination steps, the scope of the problem can be quickly located. Most malfunctions, such as software conflicts, signal lines or power plate failure, usually cost up to several hundred dollars for maintenance without excessive anxiety or blind change of television。
Detailed analysis: from easy to hard, find out who the real black screen is
Queries should follow a sequence from simplicity to complexity and avoid making a fuss。
Step 1: basic inspection
First, you rule out the lowest level of error. Confirm that power plugs have been plugged, the power lines are intact and the plugs are functioning. An attempt was then made to replace the remote control battery and to ensure that the positive and negative poles were installed correctly. Finally, it is important not to forget that there is usually a physical power button on the side or back of the tv, and to try to turn it on in order to eliminate the lack of response caused by the remote control failure。
Step 2: software and signal source checking
If the basic inspection fails, focus software and signals follow. Forced restarting is an effective solution to temporary software card death: long press the power key 5-10 seconds on a television body or remote control until the television is shut down and re-opened. The more radical method is to restart the power outage: unplugging the power plug, placing it in place for more than three to five minutes, completely discharge the capacitor and restarting it。
At the same time, check the feed source of the television. Confirms that the currently selected signal sources (e. G., hdmi 1, av, tv) are in line with the devices you are using (top boxes, games) and try to re-plug or replace links such as hdmi。
For more persistent systemic problems, recovery models can be tried. Part of the model can be closed, hold down the body volume + key and then press the power key to open until you enter the recovery mode interface. You can also try the remote control combination: hold on to the power key and press the volume + key for about five seconds until the seamail logo appears。
Step 3: preliminary determination of hardware failure (key steps)
If the restart and restoration operation is not effective, hardware failure is considered. At this point, a simple test will determine the most common hardware problem - the failure of the backlight system. In the dark environment, the flashlights are close to the screen and are carefully observed from the side. If very vague image contours or logo shadows can be seen, it is generally assumed that backlights or backlight drives are damaged, while the screen itself and the main board image output may be normal。
