Hello!
i bought a "water-damaged" macbook pro 13,3" mid 2012 A1287 with 820-3115b logicboard. RAM and display were not working and not booting, so i cleaned everything with alcohol and now it boots up fine, but the display is still not working. it has working backlight, but its just black screen.
i hooked up my external monitor and it works perfectly. everything works except the display.
the internal monitor gets recognized as a 13,9" 1280x1024 75hz monitor.
if i disconnect the internal display and access the macbook via screensharing there shows up an 23" display, which isnt connected.
so i checked the internal displays EDID and it is corrupt as you can see on the attachment. so i went on and tested the screen and lvds cable on another macbook and it worked perfectly.
i gave a look at the lvds connector and there was a pin looking strange so i thought the connector could be bad. i have board schematics and everything i need from this forum (thank you!) and it turned out that this strange pin is for led backlight, which is working!.
i am not very experienced with stuff like that, so i was just able to test if there is GND on the connector where it should be and if there is some kind of connection between the pins and the smd-parts where it should be. i have not tested voltage and stuff, because i have no idea how. i do not have the tools for this, just a cheap multimeter and a cheap soldering iron - but videos from louis rossmann proof that it could be done with this stuff
sooo, what i am asking for is just your opinion, what should i do now?
i cant se a damaged component on the board, so i think it must be the lvds connector itself. since everything else works fine i do not believe the pantherpoint chipset is damaged.
i live in austria, no one here wants to repair logicboards.. everyone tells me "oh it must be a bad logicboard, get a new one".. i think i would be able to swap out the lvds connector, if you could help me to enclose the problem. if i should measure something you have to tell me how i have to do this.. i am afraid of damaging the board so i just went on with continuity testing.
sorry for my bad english, i hope you can understand where my problem is and i hope you can help me.
nice greetings from austria
marc
i bought a "water-damaged" macbook pro 13,3" mid 2012 A1287 with 820-3115b logicboard. RAM and display were not working and not booting, so i cleaned everything with alcohol and now it boots up fine, but the display is still not working. it has working backlight, but its just black screen.
i hooked up my external monitor and it works perfectly. everything works except the display.
the internal monitor gets recognized as a 13,9" 1280x1024 75hz monitor.
if i disconnect the internal display and access the macbook via screensharing there shows up an 23" display, which isnt connected.
so i checked the internal displays EDID and it is corrupt as you can see on the attachment. so i went on and tested the screen and lvds cable on another macbook and it worked perfectly.
i gave a look at the lvds connector and there was a pin looking strange so i thought the connector could be bad. i have board schematics and everything i need from this forum (thank you!) and it turned out that this strange pin is for led backlight, which is working!.
i am not very experienced with stuff like that, so i was just able to test if there is GND on the connector where it should be and if there is some kind of connection between the pins and the smd-parts where it should be. i have not tested voltage and stuff, because i have no idea how. i do not have the tools for this, just a cheap multimeter and a cheap soldering iron - but videos from louis rossmann proof that it could be done with this stuff
sooo, what i am asking for is just your opinion, what should i do now?
i cant se a damaged component on the board, so i think it must be the lvds connector itself. since everything else works fine i do not believe the pantherpoint chipset is damaged.
i live in austria, no one here wants to repair logicboards.. everyone tells me "oh it must be a bad logicboard, get a new one".. i think i would be able to swap out the lvds connector, if you could help me to enclose the problem. if i should measure something you have to tell me how i have to do this.. i am afraid of damaging the board so i just went on with continuity testing.
sorry for my bad english, i hope you can understand where my problem is and i hope you can help me.
nice greetings from austria
marc
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