In my experience with the IGP Haswell Dell Latitudes, the issue is a mixed bag - on the ones where they crammed the i7 MQ/8790M (15” E6540), the GPU is usually bad - they’re cramming 82W of total TDP through ONE fan, so the GPU is usually bad.
On the E6440 8690M/i5 M, it’s usually a display issue but the GPU could also be bad. On the i5/Intel HD configuration, typically a bad screen.
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However, the definitive way to determine if it’s the board beyond speculating based on the configuration is to use the built-in LCD test - if the display works, it’s the board. if the computer works but not the display, there’s an issue with the display. What you want to do to test this is to press and hold down the D key and press the power button, and see how the computer behaves.
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What I would do first on a machine like this is strip it down to the bare minimum on what is installed based on what is there and what is likely the issue. If it was a no boot issue, I may opt to remove the keyboard and then disconnect any accessories like the trackpad and volume buttons. Once that fails, go for the CMOS battery, press the power button to remove any flea power and let it sit unplugged for 5-10 minutes to get a fresh BIOS to work with. If that doesn’t work, I go for the WiFi/WWAN cards, optical drive and SSD until I get it to boot again. Once it boots, it all goes back in until I know what did it.
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+
However, even if you continue to have issues after stripping it down, the definitive way to determine if it’s the board is to use the built-in LCD test - if the display works, it’s the board. if the computer works but not the display, there’s an issue with the display. What you want to do to test this is to press and hold down the D key and press the power button, and see how the computer behaves.
'''WARNING: ON THE E6X40 SERIES, there are TWO display types - LVDS and iDP and they go to the following configurations:'''
* '''LVDS: Intel HD'''
* '''iDP: Radeon 86/8790M+Intel HD'''
** '''Note: Some Intel HD E6X40’s use the iDP display as well - check to be sure.'''
Since it’s a known issue on the E6 series, I would strongly advise checking the service tag for any clues of the iDP panel and making sure you know which connector goes to each type. See this for an example of that the iDP machines show up on the Dell system configuration to get an idea of what to look for:
[image|2173102]
'''It’s especially important to know if you look for a bare replacement display but say, you find the entire assembly for not much more and it may potentially have a higher resolution panel or be in better shape cosmetically. The sellers never seem to know, so go with your gut and check the connector in the photos.'''
As another aide to spot the difference, I have attached a photo of the more common LVDS board connection so you can quickly identify it from the iDP version when you check the connector type:
[image|2173222]
If you want to see the iDP connector, I have one I can use for it.
In my experience with the IGP Haswell Dell Latitudes, the issue is a mixed bag - on the ones where they crammed the i7 MQ/8790M (15” E6540), the GPU is usually bad - they’re cramming 82W of total TDP through ONE fan, so the GPU is usually bad.
On the E6440 8690M/i5 M, it’s usually a display issue but the GPU could also be bad. On the i5/Intel HD configuration, typically a bad screen.
However, the definitive way to determine if it’s the board beyond speculating based on the configuration is to use the built-in LCD test - if the display works, it’s the board. if the computer works but not the display, there’s an issue with the display. What you want to do to test this is to press and hold down the D key and press the power button, and see how the computer behaves.
'''WARNING: ON THE E6X40 SERIES, there are TWO display types - LVDS and iDP and they go to the following configurations:'''
* '''LVDS: Intel HD'''
* '''iDP: Radeon 86/8790M+Intel HD'''
** '''Note: Some Intel HD E6X40’s use the iDP display as well - check to be sure.'''
Since it’s a known issue on the E6 series, I would strongly advise checking the service tag for any clues of the iDP panel and making sure you know which connector goes to each type. See this for an example of that the iDP machines show up on the Dell system configuration to get an idea of what to look for:
[image|2173102]
'''It’s especially important to know if you look for a bare replacement display but say, you find the entire assembly for not much more and it may potentially have a higher resolution panel or be in better shape cosmetically. The sellers never seem to know, so go with your gut and check the connector in the photos.'''
As another aide to spot the difference, I have attached a photo of the more common LVDS board connection so you can quickly identify it from the iDP version when you check the connector type:
-
[image|2173092]
+
[image|2173222]
If you want to see the iDP connector, I have one I can use for it.
In my experience with the IGP Haswell Dell Latitudes, the issue is a mixed bag - on the ones where they crammed the i7 MQ/8790M (15” E6540), the GPU is usually bad - they’re cramming 82W of total TDP through ONE fan, so the GPU is usually bad.
On the E6440 8690M/i5 M, it’s usually a display issue but the GPU could also be bad. On the i5/Intel HD configuration, typically a bad screen.
However, the definitive way to determine if it’s the board beyond speculating based on the configuration is to use the built-in LCD test - if the display works, it’s the board. if the computer works but not the display, there’s an issue with the display. What you want to do to test this is to press and hold down the D key and press the power button, and see how the computer behaves.
'''WARNING: ON THE E6X40 SERIES, there are TWO display types - LVDS and iDP and they go to the following configurations:'''
* '''LVDS: Intel HD'''
* '''iDP: Radeon 86/8790M+Intel HD'''
** '''Note: Some Intel HD E6X40’s use the iDP display as well - check to be sure.'''
Since it’s a known issue on the E6 series, I would strongly advise checking the service tag for any clues of the iDP panel and making sure you know which connector goes to each type. See this for an example of that the iDP machines show up on the Dell system configuration to get an idea of what to look for:
[image|2173102]
'''It’s especially important to know if you look for a bare replacement display but say, you find the entire assembly for not much more and it may potentially have a higher resolution panel or be in better shape cosmetically. The sellers never seem to know, so go with your gut and check the connector in the photos.'''
As another aide to spot the difference, I have attached a photo of the more common LVDS board connection so you can quickly identify it from the iDP version when you check the connector type:
[image|2173092]
-
If you want to see the iDP connector, I have one coming today I bought for spare parts with a no video condition I can add a photo of to this answer.
+
If you want to see the iDP connector, I have one I can use for it.
In my experience with the IGP Haswell Dell Latitudes, the issue is a mixed bag - on the ones where they crammed the i7 MQ/8790M (15” E6540), the GPU is usually bad - they’re cramming 82W of total TDP through ONE fan, so the GPU is usually bad.
On the E6440 8690M/i5 M, it’s usually a display issue but the GPU could also be bad. On the i5/Intel HD configuration, typically a bad screen.
However, the definitive way to determine if it’s the board beyond speculating based on the configuration is to use the built-in LCD test - if the display works, it’s the board. if the computer works but not the display, there’s an issue with the display. What you want to do to test this is to press and hold down the D key and press the power button, and see how the computer behaves.
'''WARNING: ON THE E6X40 SERIES, there are TWO display types - LVDS and iDP and they go to the following configurations:'''
* '''LVDS: Intel HD'''
* '''iDP: Radeon 86/8790M+Intel HD'''
** '''Note: Some Intel HD E6X40’s use the iDP display as well - check to be sure.'''
Since it’s a known issue on the E6 series, I would strongly advise checking the service tag for any clues of the iDP panel and making sure you know which connector goes to each type. See this for an example of that the iDP machines show up on the Dell system configuration to get an idea of what to look for:
[image|2173102]
-
'''It’s especially important to know if you look for a bare replacement display but say find the cost of a used display assembly with the same or higher resolution is similar and you decide to replace the assembly as a unit - you need to check the connector before the purchase as sellers never seem to know the difference and it can kill the board! DO NOT trust the seller’s word - EVER.'''
+
'''It’s especially important to know if you look for a bare replacement display but say, you find the entire assembly for not much more and it may potentially have a higher resolution panel or be in better shape cosmetically. The sellers never seem to know, so go with your gut and check the connector in the photos.'''
As another aide to spot the difference, I have attached a photo of the more common LVDS board connection so you can quickly identify it from the iDP version when you check the connector type:
[image|2173092]
If you want to see the iDP connector, I have one coming today I bought for spare parts with a no video condition I can add a photo of to this answer.
In my experience with the IGP Haswell Dell Latitudes, the issue is a mixed bag - on the ones where they crammed the 8790M+i7 MQ chips (15”), the GPU is usually bad - they’re cramming 82W of total TDP through ONE fan, so the GPU is usually bad.
+
In my experience with the IGP Haswell Dell Latitudes, the issue is a mixed bag - on the ones where they crammed the i7 MQ/8790M (15” E6540), the GPU is usually bad - they’re cramming 82W of total TDP through ONE fan, so the GPU is usually bad.
-
On the E6440 8690M/i5 M, it’s usually a display issue but the GPU could also be bad. On Intel HD only E6 machines, it’s usually the screen.
+
On the E6440 8690M/i5 M, it’s usually a display issue but the GPU could also be bad. On the i5/Intel HD configuration, typically a bad screen.
However, the definitive way to determine if it’s the board beyond speculating based on the configuration is to use the built-in LCD test - if the display works, it’s the board. if the computer works but not the display, there’s an issue with the display. What you want to do to test this is to press and hold down the D key and press the power button, and see how the computer behaves.
'''WARNING: ON THE E6X40 SERIES, there are TWO display types - LVDS and iDP and they go to the following configurations:'''
* '''LVDS: Intel HD'''
* '''iDP: Radeon 86/8790M+Intel HD'''
** '''Note: Some Intel HD E6X40’s use the iDP display as well - check to be sure.'''
Since it’s a known issue on the E6 series, I would strongly advise checking the service tag for any clues of the iDP panel and making sure you know which connector goes to each type. See this for an example of that the iDP machines show up on the Dell system configuration to get an idea of what to look for:
[image|2173102]
'''It’s especially important to know if you look for a bare replacement display but say find the cost of a used display assembly with the same or higher resolution is similar and you decide to replace the assembly as a unit - you need to check the connector before the purchase as sellers never seem to know the difference and it can kill the board! DO NOT trust the seller’s word - EVER.'''
As another aide to spot the difference, I have attached a photo of the more common LVDS board connection so you can quickly identify it from the iDP version when you check the connector type:
[image|2173092]
If you want to see the iDP connector, I have one coming today I bought for spare parts with a no video condition I can add a photo of to this answer.
In my experience with the IGP Haswell Dell Latitudes, the issue is usually due to the screen failing. The quick way to rule out a bad motherboard is to press and hold down D while turning the computer on - if the display works, there’s an issue with the motherboard or RAM in many cases. Likewise, if the computer boots up correctly the display is at fault.
+
In my experience with the IGP Haswell Dell Latitudes, the issue is a mixed bag - on the ones where they crammed the 8790M+i7 MQ chips (15”), the GPU is usually bad - they’re cramming 82W of total TDP through ONE fan, so the GPU is usually bad.
+
+
On the E6440 8690M/i5 M, it’s usually a display issue but the GPU could also be bad. On Intel HD only E6 machines, it’s usually the screen.
+
+
However, the definitive way to determine if it’s the board beyond speculating based on the configuration is to use the built-in LCD test - if the display works, it’s the board. if the computer works but not the display, there’s an issue with the display. What you want to do to test this is to press and hold down the D key and press the power button, and see how the computer behaves.
'''WARNING: ON THE E6X40 SERIES, there are TWO display types - LVDS and iDP and they go to the following configurations:'''
* '''LVDS: Intel HD'''
* '''iDP: Radeon 86/8790M+Intel HD'''
** '''Note: Some Intel HD E6X40’s use the iDP display as well - check to be sure.'''
+
Since it’s a known issue on the E6 series, I would strongly advise checking the service tag for any clues of the iDP panel and making sure you know which connector goes to each type. See this for an example of that the iDP machines show up on the Dell system configuration to get an idea of what to look for:
-
Since it’s a known issue on the E6 series, I would strongly advise checking the service tag for any clues of the iDP panel and making sure you know which connector goes to each type. '''It’s especially important to know if you look for a bare replacement display but say find the cost of a used display assembly with the same or higher resolution is similar and you decide to replace the assembly as a unit - you need to check the connector before the purchase as sellers never seem to know the difference and it can kill the board!'''
+
[image|2173102]
-
In the event it turns out you can purchase the entire screen assembly for a similar price (if you can, it’s a much easier install that gives you a chance to refresh parts like worn hinges and fix other cosmetic issues), I have attached a photo of the more common LVDS board connection so you can quickly identify it from the iDP version, so you know which display assembly you need:
+
'''It’s especially important to know if you look for a bare replacement display but say find the cost of a used display assembly with the same or higher resolution is similar and you decide to replace the assembly as a unit - you need to check the connector before the purchase as sellers never seem to know the difference and it can kill the board! DO NOT trust the seller’s word - EVER.'''
+
+
As another aide to spot the difference, I have attached a photo of the more common LVDS board connection so you can quickly identify it from the iDP version when you check the connector type:
[image|2173092]
If you want to see the iDP connector, I have one coming today I bought for spare parts with a no video condition I can add a photo of to this answer.
In my experience with the IGP Haswell Dell Latitudes, the issue is usually due to the screen failing. The quick way to rule out a bad motherboard is to press and hold down D while turning the computer on - if the display works, there’s an issue with the motherboard or RAM in many cases. Likewise, if the computer boots up correctly the display is at fault.
'''WARNING: ON THE E6X40 SERIES, there are TWO display types - LVDS and iDP and they go to the following configurations:'''
* '''LVDS: Intel HD'''
* '''iDP: Radeon 86/8790M+Intel HD'''
** '''Note: Some Intel HD E6X40’s use the iDP display as well - check to be sure.'''
Since it’s a known issue on the E6 series, I would strongly advise checking the service tag for any clues of the iDP panel and making sure you know which connector goes to each type. '''It’s especially important to know if you look for a bare replacement display but say find the cost of a used display assembly with the same or higher resolution is similar and you decide to replace the assembly as a unit - you need to check the connector before the purchase as sellers never seem to know the difference and it can kill the board!'''
In the event it turns out you can purchase the entire screen assembly for a similar price (if you can, it’s a much easier install that gives you a chance to refresh parts like worn hinges and fix other cosmetic issues), I have attached a photo of the more common LVDS board connection so you can quickly identify it from the iDP version, so you know which display assembly you need:
[image|2173092]
If you want to see the iDP connector, I have one coming today I bought for spare parts with a no video condition I can add a photo of to this answer.