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Current version by: oldturkey03 (vote details) ,

Text:

Does the logic board still work without the shields? If so, I would add only one shield at a time and test. Then repeat if successful until you find which shield is causing the problem.

UPDATE (2017/05/02)

Just to recap, replacing U2 solved your charging problem but when you soldered the shields back on it failed to boot. Removing the shields didn't help and you then replaced U1600 because it looked damaged. Now the phone doesn't boot and the current draw fluctuates.

Does iTunes recognize your phone is connected? If not, then this still looks like a U2 (Tristar) problem. I don't know how experienced you are at micro-soldering so I'll suggest (no offence intended) that perhaps you may have applied too much heat when you put the shields back on. Let me know if I am concerned about this for nothing :>).

I would go back and test the main lines (BATT_VCC, VCC_MAIN, PP5V0_USB) as well as all of the voltage rails created by the PMIC (U7). I would also closely inspect the Tristar/PMIC/U1600 area for any (partially) dislodged components or solder bridges near the shield anchor points.

Status:

deletedopen
deletedopen

Edit by: oldturkey03 (vote details) ,

Text:

Does the logic board still work without the shields? If so, I would add only one shield at a time and test. Then repeat if successful until you find which shield is causing the problem.

UPDATE (2017/05/02)

Just to recap, replacing U2 solved your charging problem but when you soldered the shields back on it failed to boot. Removing the shields didn't help and you then replaced U1600 because it looked damaged. Now the phone doesn't boot and the current draw fluctuates.

Does iTunes recognize your phone is connected? If not, then this still looks like a U2 (Tristar) problem. I don't know how experienced you are at micro-soldering so I'll suggest (no offence intended) that perhaps you may have applied too much heat when you put the shields back on. Let me know if I am concerned about this for nothing :>).

I would go back and test the main lines (BATT_VCC, VCC_MAIN, PP5V0_USB) as well as all of the voltage rails created by the PMIC (U7). I would also closely inspect the Tristar/PMIC/U1600 area for any (partially) dislodged components or solder bridges near the shield anchor points.

Status:

opendeleted
opendeleted

Edit by: Minho ,

Text:

Does the logic board still work without the shields? If so, I would add only one shield at a time and test. Then repeat if successful until you find which shield is causing the problem.
 
UPDATE (2017/05/02)
 
Just to recap, replacing U2 solved your charging problem but when you soldered the shields back on it failed to boot. Removing the shields didn't help and you then replaced U1600 because it looked damaged. Now the phone doesn't boot and the current draw fluctuates.
 
Does iTunes recognize your phone is connected? If not, then this still looks like a U2 (Tristar) problem. I don't know how experienced you are at micro-soldering so I'll suggest (no offence intended) that perhaps you may have applied too much heat when you put the shields back on. Let me know if I am concerned about this for nothing :>).
Does iTunes recognize your phone is connected? If not, then this still looks like a U2 (Tristar) problem. I don't know how experienced you are at micro-soldering so I'll suggest (no offence intended) that perhaps you may have applied too much heat when you put the shields back on. Let me know if I am concerned about this for nothing :>).
 
I would go back and test the main lines (BATT_VCC, VCC_MAIN, PP5V0_USB) as well as all of the voltage rails created by the PMIC (U7). I would also closely inspect the Tristar/PMIC/U1600 area for any (partially) dislodged components or solder bridges near the shield anchor points.
I would go back and test the main lines (BATT_VCC, VCC_MAIN, PP5V0_USB) as well as all of the voltage rails created by the PMIC (U7). I would also closely inspect the Tristar/PMIC/U1600 area for any (partially) dislodged components or solder bridges near the shield anchor points.

Status:

open

Edit by: Minho ,

Text:

Does the logic board still work without the shields? If so, I would add only one shield at a time and test. Then repeat if successful until you find which shield is causing the problem.
 
UPDATE (2017/05/02)
Just to recap, replacing U2 solved your charging problem but when you soldered the shields back on it failed to boot. Removing the shields didn't help and you then replaced U1600 because it looked damaged. Now the phone doesn't boot and the current draw fluctuates.
 
Does iTunes recognize your phone is connected? If not, then this still looks like a U2 (Tristar) problem. I don't know how experienced you are at micro-soldering so I'll suggest you may have applied too much heat when you put the shields back on.
 
I would go back and test the main lines (BATT_VCC, VCC_MAIN, PP5V0_USB) as well as all of the voltage rails created by the PMIC (U7).

Status:

open

Original post by: Minho ,

Text:

Does the logic board still work without the shields? If so, I would add only one shield at a time and test. Then repeat if successful until you find which shield is causing the problem.

Status:

open