My Toshiba Satellite L25-SP151’s screen started to flicker all of a sudden, going from a brilliant and perfect image to a dimmed, contrastless one, and strangely split in two zones: a bottom horizontal zone, with about 1/4 of the total screen area in height, which shows whiter than the top zone if there is a color image showing (like the one of the Desktop) or darker if there is a white background, like when using Notepad, for instance. When the screen gets like this, both zones are perfectly delimited and show no variation in size, although the bottom zone shows active ripping lines on and off very rapidly.
The screen remains in either state, normal or abnormal, for long periods of time, until it changes from one to another; that’s when the flickering starts rapidly until it finally settles in one state at random.
I opened the screen frame and tried reseating the connections that I found accessible in there, like those at both ends of the small horizontal circuit package located at the lower part of the screen compartment, but without favorable results.
I also tried an external monitor, and the image is excellent and totally stable at all times, although I was not able to verify if the LCD screen failed during the test, since it turns off automatically when using the external monitor.
What could be the cause of this behavior? I’d appreciate very much any comments or suggestions to this problem of mine. Thank you very much in advance, and warm greetings from Mexico.
You said that the external monitor has excellent image so most likely this problem is not related to the motherboard or the video card. I think the problem is somewhere inside the display assembly, most likely you have a faulty LCD screen.
When image on the laptop LCD goes bad, can you get it back to normal by touching, twisting or torquing the screen? If you can, probably you have a bad screen.
Try reseating the video cable connection on the back of the LCD screen, not on the inverter board (small horizontal circuit package) as you did before. In some cases you can get distorted video because of bad connection between the video cable and the LCD screen.