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Current version by: Dave ,

Text:

The backlight in all the lcds for ipod touchs and iphones is built into the lCD, lets not talk about them as seperate entities as there's no way of replacing the backlight without replacing the LCD.
Firstly, have you tried a working LCD on the board to confirm the issue is the board and not the LCD or LCD flex? You could even use the orignal cracked one just for testing to see if it lights up.
next step would be to scrutinise the connector and surrounding area on the logic board under a microscope to see if any components have been corroded off or there are any shorts being cause from residue. The idea that you "cleaned like a mad man" worries me as you should only be using a light brush after the clean with IA. It's very easy to scrub off a tiny resistor even with a toothbrush.
Beyond this i would also be struggling and if it is an IC that needs replacing could very well be financially unviable.
-Dave
+Dave
-Edit: apologoies, there is indeed a sepearate IOC and backlight coil that supplys power to the backlight in the LCD, I misunderstood what was being said here. The Backlight itself is indeed within the screens but the power is derived from the |IC mentioned and photographed in this thread.
+Edit: apologies, there is indeed a sepearate IC and backlight coil that supplies power to the backlight in the LCD, I misunderstood what was being said here. The Backlight itself is indeed within the screens but the power is derived from the IC mentioned and photographed in this thread.

Status:

open

Edit by: Dave ,

Text:

The backlight in all the lcds for ipod touchs and iphones is built into the lCD, lets not talk about them as seperate entities as there's no way of replacing the backlight without replacing the LCD.
Firstly, have you tried a working LCD on the board to confirm the issue is the board and not the LCD or LCD flex? You could even use the orignal cracked one just for testing to see if it lights up.
next step would be to scrutinise the connector and surrounding area on the logic board under a microscope to see if any components have been corroded off or there are any shorts being cause from residue. The idea that you "cleaned like a mad man" worries me as you should only be using a light brush after the clean with IA. It's very easy to scrub off a tiny resistor even with a toothbrush.
Beyond this i would also be struggling and if it is an IC that needs replacing could very well be financially unviable.
-Dave
+Dave
+
+Edit: apologoies, there is indeed a sepearate IOC and backlight coil that supplys power to the backlight in the LCD, I misunderstood what was being said here. The Backlight itself is indeed within the screens but the power is derived from the |IC mentioned and photographed in this thread.

Status:

open

Edit by: Dave ,

Text:

-The backlight in all the lcds for ipod touchs and iphones is built into the lCD, lets talk about them as seperate entities as theres no way of replacing the backlight without replacing the LCD.
+The backlight in all the lcds for ipod touchs and iphones is built into the lCD, lets not talk about them as seperate entities as there's no way of replacing the backlight without replacing the LCD.
Firstly, have you tried a working LCD on the board to confirm the issue is the board and not the LCD or LCD flex? You could even use the orignal cracked one just for testing to see if it lights up.
-next step would be to scrutinise the connector and surrounding are on the logic board under a microscope to see if any components have been corroded off. The idea that you "cleaned like a mad man" worries me as you should only be using a light brush after the clean with IA. It's very easy to scrub off a tiny resistor even with a toothbrush.
+next step would be to scrutinise the connector and surrounding area on the logic board under a microscope to see if any components have been corroded off or there are any shorts being cause from residue. The idea that you "cleaned like a mad man" worries me as you should only be using a light brush after the clean with IA. It's very easy to scrub off a tiny resistor even with a toothbrush.
Beyond this i would also be struggling and if it is an IC that needs replacing could very well be financially unviable.
Dave

Status:

open

Original post by: Dave ,

Text:

The backlight in all the lcds for ipod touchs and iphones is built into the lCD, lets talk about them as seperate entities as theres no way of replacing the backlight without replacing the LCD.

Firstly, have you tried a working LCD on the board to confirm the issue is the board and not the LCD or LCD flex? You could even use the orignal cracked one just for testing to see if it lights up.

next step would be to scrutinise the connector and surrounding are on the logic board under a microscope to see if any components have been corroded off. The idea that you "cleaned like a mad man" worries me as you should only be using a light brush after the clean with IA. It's very easy to scrub off a tiny resistor even with a toothbrush.

Beyond this i would also be struggling and if it is an IC that needs replacing could very well be financially unviable.

Dave

Status:

open