iphone 5s blue screen already changed U2 CHARGING IC

Hello,

I have an iphone 5s which TURNs ON and goes to BLUE AND RED SCREEN and reboot,

I CHANGED U2 ic, but still iphone shows RED AND BLUE SCREEN ON BOOT,

I have checked motherboard AND tracks are NOT BROKEN by wrong screws.

whats the solutiON?

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