Hi,
I have a problem with screen backlight on my MBA. The screen turns on but backlight don't. Probably I found the problem on the logic board, the yellow fuse shown with the red arrow in the image is broken.
[image|601890]
Is there anyone can help me to find the fuse specifications?
Thank you very much.
Alessio
=== Update (09/03/2015) ===
Hi Israel,
thanks a lot for your precious help providing the images.
I made the resistance measurement. Since I don't know the position of the FET pins I cannot specify when in direct or reverse polarity. Anyway here it is the values:
Q9706: 299 kohm and 288 kohm (reverse). Tested on the green circles in the image posted
Q9707: 0.7 Mohm and 5 Mohm (reverse). Tested on the red circle in the image posted.
R9788: 298 kohm
R9789: 146 kohm
C9782: 95.5 nF
I hope this numbers make sense. Waiting for your comments.
Alessio
[image|618740]
I have a problem with screen backlight on my MBA. The screen turns on but backlight don't. Probably I found the problem on the logic board, the yellow fuse shown with the red arrow in the image is broken.
[image|601890]
-
Is there anyone can help me to find the fuse specifications?
+
Is there anyone can help me to find the fuse specifications?
Thank you very much.
Alessio
+
+
=== Update (09/03/2015) ===
+
+
Hi Israel,
+
+
thanks a lot for your precious help providing the images.
+
+
I made the resistance measurement. Since I don't know the position of the FET pins I cannot specify when in direct or reverse polarity. Anyway here it is the values:
+
+
Q9706: 299 kohm and 288 kohm (reverse). Tested on the green circles in the image posted
+
+
Q9707: 0.7 Mohm and 5 Mohm (reverse). Tested on the red circle in the image posted.
+
+
R9788: 298 kohm
+
+
R9789: 146 kohm
+
+
C9782: 95.5 nF
+
+
I hope this numbers make sense. Waiting for your comments.
I have a problem with screen backlight on my MBA. The screen turns on but backlight don't. Probably I found the problem on the logic board, there is not electrical continuity in the yellow fuse shown with the red arrow in the following image:
+
I have a problem with screen backlight on my MBA. The screen turns on but backlight don't. Probably I found the problem on the logic board, the yellow fuse shown with the red arrow in the image is broken.
[image|601890]
-
Please can you help me to find the fuse specifications? Probably I can find it in the Mouser catalog.
+
Is there anyone can help me to find the fuse specifications?
Hi,
I have a problem with screen backlight on my MBA. The screen turns on but backlight don't. Probably I found the problem on the logic board, there is not electrical continuity in the yellow fuse shown with the red arrow in the following image:
[image|601890]
Please can you help me to find the fuse specifications? Probably I can find it in the Mouser catalog.
Thank you very much.
Alessio
Hi,
I have a problem with screen backlight on my MBA. The screen turns on but backlight don't. Probably I found the problem on the logic board, there is not electrical continuity in the yellow fuse shown with the red arrow in the following image:
[image|601890]
Please can you help me to find the fuse specifications? Probably I can find it in the Mouser catalog.
Thank you very much.
Alessio