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Current version by: Dan ,

Text:

Pressing on the case does not make sense here given the fact you state the external monitor is AOK. Assuming the external monitor image is good all of the time I would focus on the internal monitor signal pathway from the GPU to the LCD its self.
 
Often I replace the complete lid assembly when I get these types of issueissues as the driver logic on the back of the LCD unit or the LDVS cable has become damaged. While it is possible to disassemble the lid to get to the LDCLCD and/or the LDVS cable you do end up damaging a few parts in the process and can also break the cover glass if you are not careful.
Often I replace the complete lid assembly when I get these types of issueissues as the driver logic on the back of the LCD unit or the LDVS cable has become damaged. While it is possible to disassemble the lid to get to the LDCLCD and/or the LDVS cable you do end up damaging a few parts in the process and can also break the cover glass if you are not careful.
 
Did you bang or drop your system as some point or did it get wet or sit in a puddle of liquid? You may just need to clean the logic board and/or LDVS connector & cable end on the logic board. Follow this IFIXIT guide [guide|1729|MacBook Pro 15" Unibody Mid 2009 Logic Board Replacement] from the start to step 6, then jump to step 20 and stop there.
 
Make sure you have an ESD mat & wrist strap and the proper tools. To clean the logic board (or any spots that need cleaning). Use a can of Can'ed air a soft painters brush to wipe the dust off, and use distilled water (not tap!) with some cotton swabs (Q-Tips) and lastly, some good quality Isopropyl alcohol 85% or better. Wipe the surfaces with the a slightly damp swab with water first (if needed a few times) then go over them again with the Isopropyl alcohol. The alcohol acts as a drier here pulling the water from underneath. In any case make sure things are fully dried before powering up.

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Edit by: Dan ,

Text:

Pressing on the case does not make sense here given the fact you state the external monitor is AOK. Assuming the external monitor image is good all of the time I would focus on the internal monitor signal pathway from the GPU andto the LCD its self.
Pressing on the case does not make sense here given the fact you state the external monitor is AOK. Assuming the external monitor image is good all of the time I would focus on the internal monitor signal pathway from the GPU andto the LCD its self.
 
Often I replace the complete lid assembly when I get these types of issue as the driver logic on the back of the LCD unit or the LDVS cable has become damaged. While it is possible to disassemble the lid to get to the LDC and/or the LDVS cable you do end up damaging a few parts in the process and can also break the cover glass if you are not careful.
 
Did you bang or drop your system as some point or did it get wet or sit in a puddle of liquid? You may just need to clean the logic board and/or LDVS connector & cable end on the logic board. Follow this IFIXIT guide [guide|1729|MacBook Pro 15" Unibody Mid 2009 Logic Board Replacement] from the start to step 6, then jump to step 20 and stop there.
 
Make sure you have an ESD mat & wrist strap and the proper tools. To clean the logic board (or any spots that need cleaning). Use a can of Can'ed air a soft painters brush to wipe the dust off, and use distilled water (not tap!) with some cotton swabs (Q-Tips) and lastly, some good quality Isopropyl alcohol 85% or better. Wipe the surfaces with the a slightly damp swab with water first (if needed a few times) then go over them again with the Isopropyl alcohol. The alcohol acts as a drier here pulling the water from underneath. In any case make sure things are fully dried before powering up.

Status:

open

Edit by: Dan ,

Text:

Pressing on the case does not make sense here given the fact you state the external monitor is AOK. Assuming the external monitor image is good alall of the time I would focus on the internal monitor signal pathway from the GPU and the LCD its self.
Pressing on the case does not make sense here given the fact you state the external monitor is AOK. Assuming the external monitor image is good alall of the time I would focus on the internal monitor signal pathway from the GPU and the LCD its self.
 
Often I replace the complete lid assembly when I get these types of issue as the driver logic on the back of the LCD unit or the LDVS cable has become damaged. While it is possible to disassemble the lid to get to the LDC and/or the LDVS cable you do end up damaging a few parts in the process and can also break the cover glass if you are not careful.
 
Did you bang or drop your system as some point or did it get wet or sit in a puddle of liquid? You may just need to clean the logic board and/or LDVS connector & cable end on the logic board. Follow this IFIXIT guide [guide|1729|MacBook Pro 15" Unibody Mid 2009 Logic Board Replacement] from the start to step 6, then jump to step 20 and stop there.
 
Make sure you have an ESD mat & wrist strap and the proper tools. To clean the logic board (or any spots that need cleaning). Use a can of Can'ed air a soft painters brush to wipe the dust off, and use distilled water (not tap!) with some cotton swabs (Q-Tips) and lastly, some good quality Isopropyl alcohol 85% or better. Wipe the surfaces with the a slightly damp swab with water first (if needed a few times) then go over them again with the Isopropyl alcohol. The alcohol acts as a drier here pulling the water from underneath. In any case make sure things are fully dried before powering up.

Status:

open

Original post by: Dan ,

Text:

Pressing on the case does not make sense here given the fact you state the external monitor is AOK. Assuming the external monitor image is good al of the time I would focus on the internal monitor signal pathway from the GPU and the LCD its self.

Often I replace the complete lid assembly when I get these types of issue as the driver logic on the back of the LCD unit or the LDVS cable has become damaged. While it is possible to disassemble the lid to get to the LDC and/or the LDVS cable you do end up damaging a few parts in the process and can also break the cover glass if you are not careful.

Did you bang or drop your system as some point or did it get wet or sit in a puddle of liquid? You may just need to clean the logic board and/or LDVS connector & cable end on the logic board. Follow this IFIXIT guide [guide|1729|MacBook Pro 15" Unibody Mid 2009 Logic Board Replacement] from the start to step 6, then jump to step 20 and stop there.

Make sure you have an ESD mat & wrist strap and the proper tools. To clean the logic board (or any spots that need cleaning). Use a can of Can'ed air a soft painters brush to wipe the dust off, and use distilled water (not tap!) with some cotton swabs (Q-Tips) and lastly, some good quality Isopropyl alcohol 85% or better. Wipe the surfaces with the a slightly damp swab with water first (if needed a few times) then go over them again with the Isopropyl alcohol. The alcohol acts as a drier here pulling the water from underneath. In any case make sure things are fully dried before powering up.

Status:

open