U1502 backlight IC was the culprit. Went through five of them from AliExpress which were all faulty, so beware. Bought one from a UK repair centre on eBay that uses the supplied ICs in their own repairs and it fixed the backlight. However, the phone now loops on the Apple logo continuously. I have no idea why. I’ve just changed Tristar but it’s still looping.
This guide needs amending urgently before more people destroy their LCD displays by cutting through the tape holding the backlight to the LCD glass, or pushing a pick or other tool between the LCD glass and touchscreen glass.
The guide states:
Don't insert the opening pick any deeper than the black bezel on the side of the display.
This is WRONG and will destroy your display. The black bezel is 5mm wide, this is beyond the 1mm wide adhesive and into the LCD display and backlight assembly. Do not insert anything more than 2mm down the sides of the display.
Any further than 2mm and, like me, you will be looking at a very expensive LCD display replacement.
Thanks IFIXIT.COM for publishing an incorrect guide that has destroyed my display.
You MUST NOT put the pick or whatever you are using more than 2mm under the sides of the screen, or you will cut through the adhesive tape securing the backlight assembly to the LCD glass.
This will push adhesive into the viewable area of the LCD and cause the backlight assembly to no longer be secured against the LCD fully.
I now need a new screen.
This line below from the guide is absolutely INCORRECT and will ruin your expensive display:
”Don't insert the opening pick any deeper than the black bezel on the side of the display.”
The black bezel is 5mm to 6mm wide; you MUST NOT insert anything to that depth or you will destroy your display. 2mm maximum!
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This guide needs amending urgently before more people destroy their LCD displays by cutting through the tape holding the backlight to the LCD glass, or pushing a pick or other tool between the LCD glass and touchscreen glass.
The guide states:
This is WRONG and will destroy your display. The black bezel is 5mm wide, this is beyond the 1mm wide adhesive and into the LCD display and backlight assembly. Do not insert anything more than 2mm down the sides of the display.
Any further than 2mm and, like me, you will be looking at a very expensive LCD display replacement.
Thanks IFIXIT.COM for publishing an incorrect guide that has destroyed my display.
This guide needs amending urgently.
You MUST NOT put the pick or whatever you are using more than 2mm under the sides of the screen, or you will cut through the adhesive tape securing the backlight assembly to the LCD glass.
This will push adhesive into the viewable area of the LCD and cause the backlight assembly to no longer be secured against the LCD fully.
I now need a new screen.
This line below from the guide is absolutely INCORRECT and will ruin your expensive display:
”Don't insert the opening pick any deeper than the black bezel on the side of the display.”
The black bezel is 5mm to 6mm wide; you MUST NOT insert anything to that depth or you will destroy your display. 2mm maximum!