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 diiagnosis a bit further.
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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 diagnosis 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.
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.
+
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 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.
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.