I. The failure of the long rainbow lcd screen。
1. Image screens are caused by failure of signal panels on the electrical road between the format conversion circuit and frame storage。
2. In order to deal with malfunctions, either signal processing panels are replaced or format transformer circuits and frame storage units are repaired, as well as circuits between them, including screen monitors and circuits on screens, to remove malfunctions。
Ii. There are five factors in the lcd screen:
1. Signal source transmission;
2. Logical plate failure;
Poor contact with the connection line (mainly the link between the logical plate and the display screen);
4. Screen error;
5. Display screen damage. Knowing the reasons for smart television screens, the next step could be targeted maintenance。
Iii. Method of maintenance of the long rainbow lcd screen。
Issue one: signal sources。
Solutions: move television to a better signal. If it's still bad, it's a tv failure. If the image becomes clear, it's the cable signal。
Question two: logic panel failure。
Solutions:
(1) test the normality of the input video signal wave type sent by the digital image processing circuit on the logboard. If a normal wave type input is available, indicate that the front digital image processing circuit is working normally。
(2) tests whether the power input on the logboard is normal. If the voltage input is normal, the power circuit works。
(3) to detect the normality of the lcd signal wave type from the output of the upper screen interface of the logical plate. If there is no normal lcd-driven signal wave output, the logboard circuit may fail。
Question three: connection lines (screen)
Solutions: could be wet, causing screen electricity. Dismantling machines check if screen circuits are open. Connecting the logical panel with screen circuits and touching the chips on the logical panel to see if the images change。
Question four: the screen is wrong。
Solution: images and characters appear on the screen, which may be a screen error and enters the bus to the screen. The mode of access to the bus: reduce the volume to zero in television mode, hold down the silent key 3s on the remote, and then press the machine menu to enter the plant pattern. Adjustment methods and data: the numbers after index represent the index numbers for the current adjustment, which can be switched to different index numbers by p+/p-key. Select the adjustment item by pressing either the number key or the p+/p-key, and the v+/v-key。
Smart tv versions are too low to change screen referencing data, using usb to upgrade machines, software to decompress to the ucd directory, ucd to usb1, whole machine to start, and in a tv state press the remote-controlled menu key to automatically detect the disk, indicating whether it needs to be upgraded。
Question five: the screen is broken。
Solutions: if it is determined that the screen is broken, the post-sale service will be required to change the screen, but the pen will caution that the total price of the lcd screen is over 60 per cent and the cost of replacing the screen will not be easy to change。
