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Versión actual por: Minho ,

Texto:

Congratulations, you took the roper steps in trying to recover this device. The one thing you would need to add to your process is to remove the EMI shields from the logic board. Even though the board is in the ultrasonic bath, the shields do impede a proper cleaning under the IC's.
 
That said, even a proper and full cleaning does not guarantee a functional phone. The water may have caused some electrical damage such as short causing blown components or damaged IC's. Once the phone is properly cleaned, it needs to be troubleshooted with a schematic in hand to understand where the fault(s) lie.
 
If you are comfortable with this, then start at the beginning and check PP_BATT_VCC, PP_VCC_MAIN and PP5V0_USB. I would start by checking to see if those rails are shorted to ground. If one of these rails is shorted to ground, then you will need to identify what is causing the short.
 
If you are measuring the proper voltage, then you move onto the PMIC and check the voltage rails it generates. The PMIC generates ~15 voltage rails. You can find the schematic on the GSMForum.
 
Otherwise, consider finding a repair shop that does water damage and micro-soldering repairs.
 
=== Update (01/06/2018) ===
 
I really appreciate your help¡ Unfortunately , my knowledge is quite basic to go further with this trouble.
 
Anyway, I will try to do all steps you mentioned above¡ Even replacing the battery.. do you think the battey could be in a poor condition due to the water?
 
Thanks a lot

Estado:

open

Editado por: Fernando ,

Texto:

Congratulations, you took the roper steps in trying to recover this device. The one thing you would need to add to your process is to remove the EMI shields from the logic board. Even though the board is in the ultrasonic bath, the shields do impede a proper cleaning under the IC's.
 
That said, even a proper and full cleaning does not guarantee a functional phone. The water may have caused some electrical damage such as short causing blown components or damaged IC's. Once the phone is properly cleaned, it needs to be troubleshooted with a schematic in hand to understand where the fault(s) lie.
 
If you are comfortable with this, then start at the beginning and check PP_BATT_VCC, PP_VCC_MAIN and PP5V0_USB. I would start by checking to see if those rails are shorted to ground. If one of these rails is shorted to ground, then you will need to identify what is causing the short.
 
If you are measuring the proper voltage, then you move onto the PMIC and check the voltage rails it generates. The PMIC generates ~15 voltage rails. You can find the schematic on the GSMForum.
 
Otherwise, consider finding a repair shop that does water damage and micro-soldering repairs.
 
=== Update (01/06/2018) ===
 
I really appreciate your help¡ Unfortunately , my knowledge is quite basic to go further with this trouble.
 
Anyway, I will try to do all steps you mentioned above¡ Even replacing the battery.. do you think the battey could be in a poor condition due to the water?
 
Thanks a lot

Estado:

open

Editado por: Minho ,

Texto:

Congratulations, you took the roper steps in trying to recover this device. The one thing you would need to add to your process is to remove the EMI shields from the logic board. Even though the board is in the ultrasonic bath, the shields do impede a proper cleaning under the IC's.
Congratulations, you took the roper steps in trying to recover this device. The one thing you would need to add to your process is to remove the EMI shields from the logic board. Even though the board is in the ultrasonic bath, the shields do impede a proper cleaning under the IC's.
 
That said, even a proper and full cleaning does not guarantee a functional phone. The water may have caused some electrical damage such as short causing blown components or damaged IC's. Once the phone is properly cleaned, it needs to be troubleshooted with a schematic in hand to understand where the fault(s) lie.
 
If you are comfortable with this, then start at the beginning and check PP_BATT_VCC, PP_VCC_MAIN and PP5V0_USB. I would start by checking to see if those rails are shorted to ground. If one of these rails is shorted to ground, then you will need to identify what is causing the short.
 
If you are measuring the proper voltage, then you move onto the PMIC and check the voltage rails it generates. The PMIC generates ~15 voltage rails. You can find the schematic on the GSMForum.

Otherwise, consider finding a repair shop that does water damage and micro-soldering repairs.
If you are measuring the proper voltage, then you move onto the PMIC and check the voltage rails it generates. The PMIC generates ~15 voltage rails. You can find the schematic on the GSMForum.

Otherwise, consider finding a repair shop that does water damage and micro-soldering repairs.

Estado:

open

Original post by: Minho ,

Texto:

Congratulations, you took the roper steps in trying to recover this device. The one thing you would need to add is to remove the EMI shields from the logic board. Even though the board is in the ultrasonic bath, the shields do impede a proper cleaning under the IC's.

That said, even a proper and full cleaning does not guarantee a functional phone. The water may have caused some electrical damage such as short causing blown components or damaged IC's. Once the phone is properly cleaned, it needs to be troubleshooted with a schematic in hand to understand where the fault(s) lie.

If you are comfortable with this, then start at the beginning and check PP_BATT_VCC, PP_VCC_MAIN and PP5V0_USB. I would start by checking to see if those rails are shorted to ground. If one of these rails is shorted to ground, then you will need to identify what is causing the short.

If you are measuring the proper voltage, then you move onto the PMIC and check the voltage rails it generates. The PMIC generates ~15 voltage rails.

Estado:

open