I have a Mid 2012 MBP 13" 2.9 Ghz i7 here that is baffling us...
It chimes and that is it - No Display, just stays black.
The GPU was fine as it only went in for a backlight fuse repair.
***WE CAN RULE OUT*** the following as they have been tested on other units:
Screen / LCD cable / SSD / RAM / Keyboard / Touch pad & Battery are all good.
The backlight fuse is new and OK & display voltages are also OK.
External display is OK. Just nothing displays on the units screen.
SMC & PRAM have been reset multiple times in testing.
Upon booting we have a chime and that's it, after some time if you press any key it will flash the screen indicating that the backlight is OK. But nothing else The LCD connector is clean and shows no sign of wear or corrosion and also gives voltage readings. Are there any other voltage lines that we need to check that maybe have been missed upon to check or can anyone point us to what they personally would check from the start for voltages regarding displaying graphics? @oldturkey03 Any suggestions? What line is responsible for the display working from the connector backwards?
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Similar to this issue [link|https://www.youtube.com/watch?v=GQwSGI1kNKg|Display Shows Backlight but No Image]
I have a Mid 2012 MBP 13" 2.9 Ghz i7 here that is baffling us...
It chimes and that is it - No Display, just stays black.
The GPU was fine as it only went in for a backlight fuse repair.
***WE CAN RULE OUT*** the following as they have been tested on other units:
Screen / LCD cable / SSD / RAM / Keyboard / Touch pad & Battery are all good.
The backlight fuse is new and OK & display voltages are also OK.
External display is OK. Just nothing displays on the units screen.
SMC & PRAM have been reset multiple times in testing.
-
Upon booting we have a chime and that's it, after some time if you press any key it will flash the screen indicating that the backlight is OK. But nothing else The LCD connector is clean and shows no sign of wear or corrosion and also gives voltage readings. Are there any other voltage lines that we need to check that maybe have been missed upon to check or can anyone point us to what they personally would check from the start for voltages regarding displaying graphics? @oldturkey03 Any suggestions?
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Upon booting we have a chime and that's it, after some time if you press any key it will flash the screen indicating that the backlight is OK. But nothing else The LCD connector is clean and shows no sign of wear or corrosion and also gives voltage readings. Are there any other voltage lines that we need to check that maybe have been missed upon to check or can anyone point us to what they personally would check from the start for voltages regarding displaying graphics? @oldturkey03 Any suggestions? What line is responsible for the display working from the connector backwards?
I have a Mid 2012 MBP 13" 2.9 Ghz i7 here that is baffling us...
It chimes and that is it - No Display, just stays black.
The GPU was fine as it only went in for a backlight fuse repair.
***WE CAN RULE OUT*** the following as they have been tested on other units:
Screen / LCD cable / SSD / RAM / Keyboard / Touch pad & Battery are all good.
The backlight fuse is new and OK & display voltages are also OK.
External display is OK. Just nothing displays on the units screen.
+
SMC & PRAM have been reset multiple times in testing.
+
Upon booting we have a chime and that's it, after some time if you press any key it will flash the screen indicating that the backlight is OK. But nothing else The LCD connector is clean and shows no sign of wear or corrosion and also gives voltage readings. Are there any other voltage lines that we need to check that maybe have been missed upon to check or can anyone point us to what they personally would check from the start for voltages regarding displaying graphics? @oldturkey03 Any suggestions?
I have a Mid 2012 MBP 13" here that is baffling us...
+
I have a Mid 2012 MBP 13" 2.9 Ghz i7 here that is baffling us...
It chimes and that is it - No Display, just stays black.
The GPU was fine as it only went in for a backlight fuse repair.
***WE CAN RULE OUT*** the following as they have been tested on other units:
Screen / LCD cable / SSD / RAM / Keyboard / Touch pad & Battery are all good.
The backlight fuse is new and OK & display voltages are also OK.
External display is OK. Just nothing displays on the units screen.
Upon booting we have a chime and that's it, after some time if you press any key it will flash the screen indicating that the backlight is OK. But nothing else The LCD connector is clean and shows no sign of wear or corrosion and also gives voltage readings. Are there any other voltage lines that we need to check that maybe have been missed upon to check or can anyone point us to what they personally would check from the start for voltages regarding displaying graphics? @oldturkey03 Any suggestions?
I have a Mid 2012 MBP 13" here that is baffling us...
It chimes and that is it - No Display, just stays black.
The GPU was fine as it only went in for a backlight fuse repair.
***WE CAN RULE OUT*** the following as they have been tested on other units:
Screen / LCD cable / SSD / RAM / Keyboard / Touch pad & Battery are all good.
The backlight fuse is new and OK & display voltages are also OK.
External display is OK. Just nothing displays on the units screen.
-
Upon booting we have a chime and that's it, after some time if you press any key it will flash the screen indicating that the backlight is OK. But nothing else The LCD connector is clean and shows no sign of wear or corrosion and also gives voltage readings. Are there any other voltage lines that we need to check that maybe have been missed upon to check or can anyone point us to what they personally would check from the start for voltages regarding displaying graphics?
+
Upon booting we have a chime and that's it, after some time if you press any key it will flash the screen indicating that the backlight is OK. But nothing else The LCD connector is clean and shows no sign of wear or corrosion and also gives voltage readings. Are there any other voltage lines that we need to check that maybe have been missed upon to check or can anyone point us to what they personally would check from the start for voltages regarding displaying graphics? @oldturkey03 Any suggestions?
I have a Mid 2012 MBP 13" here that is baffling us...
It chimes and that is it - No Display, just stays black.
The GPU was fine as it only went in for a backlight fuse repair.
***WE CAN RULE OUT*** the following as they have been tested on other units:
Screen / LCD cable / SSD / RAM / Keyboard / Touch pad & Battery are all good.
The backlight fuse is new and OK & display voltages are also OK.
External display is OK. Just nothing displays on the units screen.
-
Upon booting we have a chime and that's it, after some time if you press any key it will flash the screen indicating that the backlight is OK. But nothing else The LCD connector is clean and shows no sign of wear or corrosion and also gives voltage readings. Are there any other voltage lines that we need to check that maybe have been missed upon to check or can anyone point us to what they personally would check for voltages regarding displaying graphics?
+
Upon booting we have a chime and that's it, after some time if you press any key it will flash the screen indicating that the backlight is OK. But nothing else The LCD connector is clean and shows no sign of wear or corrosion and also gives voltage readings. Are there any other voltage lines that we need to check that maybe have been missed upon to check or can anyone point us to what they personally would check from the start for voltages regarding displaying graphics?
I have a Mid 2012 MBP 13" here that is baffling us...
It chimes and that is it - No Display, just stays black.
The GPU was fine as it only went in for a backlight fuse repair.
***WE CAN RULE OUT*** the following as they have been tested on other units:
Screen / LCD cable / SSD / RAM / Keyboard / Touch pad & Battery are all good.
The backlight fuse is new and OK & display voltages are also OK.
External display is OK. Just nothing displays on the units screen.
Upon booting we have a chime and that's it, after some time if you press any key it will flash the screen indicating that the backlight is OK. But nothing else The LCD connector is clean and shows no sign of wear or corrosion and also gives voltage readings. Are there any other voltage lines that we need to check that maybe have been missed upon to check or can anyone point us to what they personally would check for voltages regarding displaying graphics?