Accepted
One, probably due to the irregularity of the power circuits of the three-ocean televisions, the problem is that the panel buttons do not react and the light is not on. 2. There may be problems with a signal processor at a later level due to overloading of the power supply's 5v voltage, and subsequent pull of the voltage too low. 3. If the power supply of the television is normal, it may be due to problems with the television drive back-ray circuit, which results in a sound on the television black screen. / suggested approach: 1. First, it should check the normality of the 12v voltage and 5v voltage of the oltv, and if the voltage is normal, there may be a problem with input of the level of the power circuit, which is usually a problem with the power insurance being burned or with the steady pressure chip, which requires the replacement of the television. 2. There is a need to remove the problematic elements one by one and then check out the problematic elements and replace the malfunctioning elements so that the voltage can return to normal. The replacement is carried out at professional maintenance points with specialized maintenance staff. 3. Connect the monitor to the host for a switch-on check, and when you approach the screen you can see a very dark image on the screen, which proves that the signal processing function of the drive is normal. The problem is that the functional circuit that drives the backlight high-voltage control panel switch is malfunctioning and the failure of the functional circuit can be restored。
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One, probably due to the irregularity of the power circuits of the three-ocean televisions, the problem is that the panel buttons do not react and the light is not on. 2. There may be problems with a signal processor at a later level due to overloading of the power supply's 5v voltage, and subsequent pull of the voltage too low. 3. If the power supply of the television is normal, it may be due to problems with the television drive back-ray circuit, which results in a sound on the television black screen. Suggested approach 1: first, it should check the normality of the 12v voltage and 5v voltage of the 3x3 television, and if the voltage is normal, there may be problems with input of the level of the power circuit, which is usually a problem with the power insurance being burned or with the steady pressure chip, which requires replacement of the television. 2. There is a need to remove the problematic elements one by one and then check out the problematic elements and replace the malfunctioning elements so that the voltage can return to normal. The replacement is carried out at professional maintenance points with specialized maintenance staff. 3. Connect the monitor to the host for a switch-on check, and when you approach the screen you can see a very dark image on the screen, which proves that the signal processing function of the drive is normal. The problem is that the functional circuit that drives the backlight high-voltage control panel switch is malfunctioning and the failure of the functional circuit can be restored。
Screen saver
You can't even look for trouble. Tell you what's wrong. Can you fix it? The only thing you can do is fix it。
If you can see dim images on the black screen, it's backlight circuits or power panel problems. If it's like this for about 10 minutes each time, it's the heat stability of the backlight or the power panel's metaware, and the black screen problems when it's hot。
The problem may be due to irregular power circuits in the tri-ocean television system, as evidenced by the absence of any reaction from panel keys and the non-lighting of the indicator lights. 2. There may be problems with a signal processor at a later level due to overloading of the power supply's 5v voltage, and subsequent pull of the voltage too low. 3. If the power supply of the television is normal, it may be due to problems with the television drive back-ray circuit, which results in a sound on the television black screen. / suggested approach: 1. First, it should check the normality of the 12v voltage and 5v voltage of the oltv, and if the voltage is normal, there may be a problem with input of the level of the power circuit, which is usually a problem with the power insurance being burned or with the steady pressure chip, which requires the replacement of the television. 2. There is a need to remove the problematic elements one by one and then check out the problematic elements and replace the malfunctioning elements so that the voltage can return to normal. The replacement is carried out at professional maintenance points with specialized maintenance staff. 3. Connect the monitor to the host for a switch-on check, and when you approach the screen you can see a very dark image on the screen, which proves that the signal processing function of the drive is normal. The problem is that the functional circuit that drives the backlight high-voltage control panel switch is malfunctioning and the failure of the functional circuit can be restored。
Ten seconds before it went dark, the maintenance crew came in and said the circuit board was broken, $500, not necessarily fixed
Stand by. Press the channel and adjust。
