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当前版本: philippe ,

文本:

Hi there. I've just had the exact same issue this evening. As I had purchased a glass/digitizer only in first place (which I couldn't manage to install without destroying the original LCD as it is glued to the digitizer), I was able to push the diiagnosisdiagnosis a bit further.
Hi there. I've just had the exact same issue this evening. As I had purchased a glass/digitizer only in first place (which I couldn't manage to install without destroying the original LCD as it is glued to the digitizer), I was able to push the diiagnosisdiagnosis a bit further.
 
-When booting with the LCD/digitizer assembly connected, the digitizer is totaly unresponsive. I suspected a flex cable damage or ESR damage to the digitizer chip, althought I am an experienced repair guy with all the proper equipment.
 
-I then turned off the phone, and swapped the digitizer connector with the Glass/digitzer I had purchased before, just to make sure the problem was not coming from the logic board of the phone. And the glass/digitizer worked fine.
 
-Now with the phone still powered on, I hot swapped the two digitizers, and the previously not working digitizer started working. It all stops working when you reboot the phone.
 
-I have double checked every connector related issues and tested continuity on all traces. Hardware failure is not the origin of the problem.
 
So my diagnosis is as follows : the digitizer chip provided by the manufacturer of these LCD/digitzers is not registering properly at boot with the kernel. If you put a properly registering one, the drivers will load up fine, and will be used properly with the "defective" digitizer as long as they stay loaded in memory.
 
I have a 4.4.4 Kitkat, I have looked several places on google to find any low level trick to fix this driver issue but could not find any real solution. I have contacted the seller on ebay (elife-tribe) to address the issue and to know if they are aware of the problem. I'll keep you updated of any further development.

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open

编辑: philippe ,

文本:

Hi there. I've just had the exact same issue this evening. As I had purchasepurchased a glass/digitizer only in first place (which I couldn't manage to install without destroying the original LCD as it is glued to the digitizer), I was able to push the diiagnosis a bit further.
Hi there. I've just had the exact same issue this evening. As I had purchasepurchased a glass/digitizer only in first place (which I couldn't manage to install without destroying the original LCD as it is glued to the digitizer), I was able to push the diiagnosis a bit further.
 
-When booting with the LCD/digitizer assembly connected, the digitizer is totaly unresponsive. I suspected a flex cable damage or ESR damage to the digitizer chip, althought I am an experienced repair guy with all the proper equipment.
 
-I then turned off the phone, and swapped the digitizer connector with the Glass/digitzer I had purchased before, just to make sure the problem was not coming from the logic board of the phone. And the glass/digitizer worked fine.
 
-Now with the phone still powered on, I hot swapped the two digitizers, and the previously not working digitizer started working. It all stops working when you reboot the phone.
 
-I have double checked every connector related issues and tested continuity on all traces. Hardware failure is not the origin of the problem.
 
So my diagnosis is as follows : the digitizer chip provided by the manufacturer of these LCD/digitzers is not registering properly at boot with the kernel. If you put a properly registering one, the drivers will load up fine, and will be used properly with the "defective" digitizer as long as they stay loaded in memory.
 
I have a 4.4.4 Kitkat, I have looked several places on google to find any low level trick to fix this driver issue but could not find any real solution. I have contacted the seller on ebay (elife-tribe) to address the issue and to know if they are aware of the problem. I'll keep you updated of any further development.

状态:

open

原帖由: philippe ,

文本:

Hi there. I've just had the exact same issue this evening. As I had purchase a glass/digitizer only in first place (which I couldn't manage to install without destroying the original LCD as it is glued to the digitizer), I was able to push the diiagnosis a bit further.

-When booting with the LCD/digitizer assembly connected, the digitizer is totaly unresponsive. I suspected a flex cable damage or ESR damage to the digitizer chip, althought I am an experienced repair guy with all the proper equipment.

-I then turned off the phone, and swapped the digitizer connector with the Glass/digitzer I had purchased before, just to make sure the problem was not coming from the logic board of the phone. And the glass/digitizer worked fine.

-Now with the phone still powered on, I hot swapped the two digitizers, and the previously not working digitizer started working. It all stops working when you reboot the phone.

-I have double checked every connector related issues and tested continuity on all traces. Hardware failure is not the origin of the problem.

So my diagnosis is as follows : the digitizer chip provided by the manufacturer of these LCD/digitzers is not registering properly at boot with the kernel. If you put a properly registering one, the drivers will load up fine, and will be used properly with the "defective" digitizer as long as they stay loaded in memory.

I have a 4.4.4 Kitkat, I have looked several places on google to find any low level trick to fix this driver issue but could not find any real solution. I have contacted the seller on ebay (elife-tribe) to address the issue and to know if they are aware of the problem. I'll keep you updated of any further development.

状态:

open