CyberDocLLC : No Backlight or Dim Screen fix for iPhone 4S  plus 1cm QuickAlloy Desoldering Alloy (you need this alloy for this repair)Brand new and sealed OEM IC for the iPhone 4S Logic Board Backlight Circuitry Repair. The IC comes in its original packaging tape and ships via USPS First Class Mail Flat Envelope (Same business day or the next). please contact us CyberDocLLC though amazon if you have any question about the listing or the item. No Backlight or Dim Screen fix for iPhone 4GS Apple iPhone 4S backlight repair part, IC controller replacement This is another common issue people have been dealing with. It just so happens that the LCD backlight on a huge number of 4 iphones have gone dark and never come back. Due to water damage the this IC and coil often get short out. The solution is to replace this on your water damaged no back-light phone and it workes 90% of the time.  please contact us CyberDocLLC if you have any question about the listing.