Analysis of common faults in LCD screens: The bright band on the screen is mainly caused by COF short circuits
Obstacle analysis; The screen bright band is mainly caused by COF short circuit,
and only when the R, G, B, and three colors are fully lit up will it form.
When the screen produces bright bands, it often affects the adjacent COFs,
causing other normal COFs to display rainbow bands, dark bands, white images,
flickering, and other phenomena. In actual maintenance, if the screen shows bright bands,
the COF with bright bands must be replaced first before judging whether the other
COFs are damaged. It is particularly important to note that after replacing the corresponding COF,
the fault is often eliminated, but the original areas with bright bands will show phenomena
such as flickering and white images, which are mostly caused by BOE screens. This is due
to the screen being in a white image state for a long time, and residual shadows appearing
on the LCD screen. In this situation, there is no need to worry, and there is no need to
suspect whether the fault has not been eliminated. Eliminating line shadows is important.
The phenomenon is simple, just turn the screen on the normal display screen for aging,
and usually the fault will disappear after one or two hours.