Hey Everyone,
I currently have a problem that I run across often enough and am always stumped as to which way to go with the machine.
In this case, I have a Toshiba Satellite L755-S5214 who's display has gone bad. In this case, it is not completely black. Instead, it is showing a consistent gray pattern on the entire screen surface. By pattern, I mean it looks like fine horizontal and vertical lines if you look closely at the screen. From a distance it simply looks like a solid gray with no other images or colorations of any kind. Even though the LCD is askew, the display is fine on the external monitor.
The reason this is always a dilemma for me is because I am not sure whether it is a screen problem or a video chip problem and to this day, I have never found a way to determine which component is the cause of the problem. If it is the chip, I do not want to waste time and money ordering a screen, but on the other hand, if it is the screen, I do not want to waste time and money on a motherboard I don't need. They way I usually address the problem is to order a replacement screen and if it turns out not to be the LCD, I return it to the vendor and try a reflow instead. This approach is time consuming if I guess wrong, so I am always wishing there was a better way to troubleshoot this sort of problem.
So, my question is this: is there a method or technique that can tell me without a doubt what the source of the problem is?
If anyone can help me with this, I would certainly appreciate it. And if there is no good way to tell, can you tell me what you usually do in a case like this one? Or, do you simply have some advice or suggestions you can offer me?
Thanks for reading.
Texson
I currently have a problem that I run across often enough and am always stumped as to which way to go with the machine.
In this case, I have a Toshiba Satellite L755-S5214 who's display has gone bad. In this case, it is not completely black. Instead, it is showing a consistent gray pattern on the entire screen surface. By pattern, I mean it looks like fine horizontal and vertical lines if you look closely at the screen. From a distance it simply looks like a solid gray with no other images or colorations of any kind. Even though the LCD is askew, the display is fine on the external monitor.
The reason this is always a dilemma for me is because I am not sure whether it is a screen problem or a video chip problem and to this day, I have never found a way to determine which component is the cause of the problem. If it is the chip, I do not want to waste time and money ordering a screen, but on the other hand, if it is the screen, I do not want to waste time and money on a motherboard I don't need. They way I usually address the problem is to order a replacement screen and if it turns out not to be the LCD, I return it to the vendor and try a reflow instead. This approach is time consuming if I guess wrong, so I am always wishing there was a better way to troubleshoot this sort of problem.
So, my question is this: is there a method or technique that can tell me without a doubt what the source of the problem is?
If anyone can help me with this, I would certainly appreciate it. And if there is no good way to tell, can you tell me what you usually do in a case like this one? Or, do you simply have some advice or suggestions you can offer me?
Thanks for reading.
Texson
