Analysis of display whitish problem on a certain reinforced integrated computer

Abstract

Abstract Aiming at the problem that the color of the display screen of a certain type of rugged integrated computer is white, the analysis and location are carried out first. By assuming a method to eliminate the problems of the main board, wiring harness and the display itself, the positioning fault exists with the LCD panel. After the test, it was found that the faulty plate was caused by the high contrast of the display control board. After a detailed analysis, the results showed that the connection of low-resistance media caused a short circuit between pins 1 and 3 in interface CN603, which had the same effect as pressing the contrast adjustment shortcut button S1. The contrast of the display control board is continuously increased, so that the display becomes white. The research in this paper enriches the cases of solving practical problems in engineering applications, and provides theoretical support and reference basis for the subsequent solving of similar problems.