If the problem is still there when you replace the video flex cable then did you disconnect the battery from the motherboard before replacing the screen?
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Sounds as though the backlight power fuse is blown.
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Sounds as though the backlight power fuse could be blown.
With at lot of laptop displays (I don’t know if this is the case with yours) the power for the backlights is always being supplied to the panel and a signal is sent on the backlight enable lead to the panel to turn on/off the backlights. Usually the backlight fuse is mounted close to the video cable connector but again I don’t know if this is the case with your laptop but maybe still worth a check.
Here’s an image from Step.7 of the ifixit [guide|51722] guide where I’ve highlighted two components that may be worth looking at.
If you have a DMM (digital multimeter) you could check them to see if one is a fuse by testing to see if they are short circuit and not open circuit or perhaps with the laptop turned on check if there is voltage on one side of the component and not the other indicating that it is blown. Again I don’t know the specs but with most it won’t be more than 20V DC
If the problem is still there when you replace the video flex cable then did you disconnect the battery from the motherboard before replacing the screen?
Sounds as though the backlight power fuse is blown.
-
With at lot od laptop displays (I don’t know if this is the case with yours) the power for the backlights is always being supplied to the panel and a signal is sent on the backlight enable lead to the panel to turn on/off the backlights. Usually the backlight fuse is mounted close to the video cable connector but again I don’t know if this is the case with your laptop but maybe still worth a check.
+
With at lot of laptop displays (I don’t know if this is the case with yours) the power for the backlights is always being supplied to the panel and a signal is sent on the backlight enable lead to the panel to turn on/off the backlights. Usually the backlight fuse is mounted close to the video cable connector but again I don’t know if this is the case with your laptop but maybe still worth a check.
Here’s an image from Step.7 of the ifixit [guide|51722] guide where I’ve highlighted two components that may be worth looking at.
If you have a DMM (digital multimeter) you could check them to see if one is a fuse by testing to see if they are short circuit and not open circuit or perhaps with the laptop turned on check if there is voltage on one side of the component and not the other indicating that it is blown. Again I don’t know the specs but with most it won’t be more than 20V DC
If the problem is still there when you replace the video flex cable then did you disconnect the battery from the motherboard before replacing the screen?
Sounds as though the backlight power fuse is blown.
-
With most laptop displays (I don’t know if this is the case with yours) the power for the backlights is always being supplied to the panel and a signal is sent on the backlight enable lead to the panel to turn on/off the backlights. Usually the backlight fuse is mounted close to the video cable connector but again I don’t know if this is the case with your laptop but maybe still worth a check.
+
With at lot od laptop displays (I don’t know if this is the case with yours) the power for the backlights is always being supplied to the panel and a signal is sent on the backlight enable lead to the panel to turn on/off the backlights. Usually the backlight fuse is mounted close to the video cable connector but again I don’t know if this is the case with your laptop but maybe still worth a check.
Here’s an image from Step.7 of the ifixit [guide|51722] guide where I’ve highlighted two components that may be worth looking at.
If you have a DMM (digital multimeter) you could check them to see if one is a fuse by testing to see if they are short circuit and not open circuit or perhaps with the laptop turned on check if there is voltage on one side of the component and not the other indicating that it is blown. Again I don’t know the specs but with most it won’t be more than 20V DC
Hi @jmg157 ,
If the problem is still there when you replace the video flex cable then did you disconnect the battery from the motherboard before replacing the screen?
Sounds as though the backlight power fuse is blown.
With most laptop displays (I don’t know if this is the case with yours) the power for the backlights is always being supplied to the panel and a signal is sent on the backlight enable lead to the panel to turn on/off the backlights. Usually the backlight fuse is mounted close to the video cable connector but again I don’t know if this is the case with your laptop but maybe still worth a check.
Here’s an image from Step.7 of the ifixit [guide|51722] guide where I’ve highlighted two components that may be worth looking at.
If you have a DMM (digital multimeter) you could check them to see if one is a fuse by testing to see if they are short circuit and not open circuit or perhaps with the laptop turned on check if there is voltage on one side of the component and not the other indicating that it is blown. Again I don’t know the specs but with most it won’t be more than 20V DC
[image|2296987]
(click on image to enlarge for better viewing)