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現在のバージョン作成者: LikeARabbit ,

テキスト:

So just to clarify, the external display DOES work and display the proper video?
 
If so then your GPU is likely ok. Assuming this these are the steps I would take:
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Shine a light into the display while the Mac is powered on. If you can see images/video then your backlight is out.
 
Try adjusting the display brightness using the F1 & F2 keys.
 
If adjusting the backlight brightness has no effect then try a PRAM/NVRAM reset, holding Command+Option+P+R while powering on your Mac, releasing all of the keys after you hear it chime three times.
 
If the issue persists then I would attempt an SMC reset, make sure your Mac is connected to it's power adapter, hold Shift+Command+Option+Power button for about 5 seconds then release all of them together, wait a second then attempt to power on normally.
 
If the issue still persists then you are dealing with a hardware issue. Possibilities include a blown backlight fuse, failed inverter or failed display.
 
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If the above test did not show any video on the internal display then I would take the following steps.
 
If adjusting the backlight brightness has no effect then try a PRAM/NVRAM reset, holding Command+Option+P+R while powering on your Mac, releasing all of the keys after you hear it chime three times.
 
If the issue persists then I would attempt an SMC reset, make sure your Mac is connected to it's power adapter, hold Shift+Command+Option+Power button for about 5 seconds then release all of them together, wait a second then attempt to power on normally.
 
If there is still no video then I would check things at a hardware level. Removing the bottom case I would disconnect the battery then disconnect and reconnect the LVDS (video) connection at the logic board ([guide|4512|Step 20]).
 
If the issue still persists then this is likely a hardware failure. Likely failed components would be the display assembly and/or logic board, although I would lean more towards the display.
 
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Hope that helps!

ステータス:

open

オリジナル投稿者: LikeARabbit ,

テキスト:

So just to clarify, the external display DOES work and display the proper video?

If so then your GPU is likely ok.  Assuming this these are the steps I would take:

Shine a light into the display while the Mac is powered on.  If you can see images/video then your backlight is out.

Try adjusting the display brightness using the F1 & F2 keys.

If adjusting the backlight brightness has no effect then try a PRAM/NVRAM reset, holding Command+Option+P+R while powering on your Mac, releasing all of the keys after you hear it chime three times.

If the issue persists then I would attempt an SMC reset, make sure your Mac is connected to it's power adapter, hold Shift+Command+Option+Power button for about 5 seconds then release all of them together, wait a second then attempt to power on normally.

If the issue still persists then you are dealing with a hardware issue.  Possibilities include a blown backlight fuse, failed inverter or failed display.

__________________________________________________________________

If the above test did not show any video on the internal display then I would take the following steps.

If adjusting the backlight brightness has no effect then try a PRAM/NVRAM reset, holding Command+Option+P+R while powering on your Mac, releasing all of the keys after you hear it chime three times.

If the issue persists then I would attempt an SMC reset, make sure your Mac is connected to it's power adapter, hold Shift+Command+Option+Power button for about 5 seconds then release all of them together, wait a second then attempt to power on normally.

If there is still no video then I would check things at a hardware level.  Removing the bottom case I would disconnect the battery then disconnect and reconnect the LVDS (video) connection at the logic board ([guide|4512|Step 20]).

If the issue still persists then this is likely a hardware failure.  Likely failed components would be the display assembly and/or logic board, although I would lean more towards the display.

__________________________________________________________________

Hope that helps!

ステータス:

open