no Display from logic board
Hi, I have a S3 and it has no display. the LCD is fine i tried another logic board and the LCD works so it's from my S3 Logic Board. any ideas what it could be?
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Hamied, this could be caused by multiple issues. All of them are logic board related since you already checked the display on another phone. To further check you will have to take a closer look at the components on the motherboard. For that you will at least require a magnifying source and a multimeter. The attached images show the common components for the display. Also, check your connector and make sure that is does not have any bend, broken or corroded pins in it. The IC's will be the hardest to check and to replace if necessary. All datasheets for the IC's are readily available.
C712 CL03A224KP3NNNC is a 220㎋, 10V, ±10%, X5R, 0201 capacitor
C713 CL03A224KP3NNNC is a 220㎋, 10V, ±10%, X5R, 0201 capacitor
C735 CL10A474KB8NNNC is a 0.47uF 50V ±10%, X5R, 0603 capacitor
L703 BLM15HD102SN1 is a EMI Suppression Filter inductor type
L706 BLM15HD102SN1 is a EMI Suppression Filter inductor type
U706 MAX77693EWQ+T is a power Management IC
U707 AAT1290AIWO-T1 is a Current Limited Load Switch
Hope this helps, good luck.
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