iphone 5s missing voltage on c204

[d42k11]

Hello

this is the 3rd iphone 5s I am working on and this phone was again booting up and everything it had back light issue i removed the backlight pmu and now replaced with new one now it wont wont boot or get detected by comp i have no voltage at pp13 and pp15, I have no voltage at c204,c281 which I am suppose to have above 4 volts when connected to computer. I have voltage at c272, c304 which means the u2 ic ok and just to make sure it was ok i tested the u2 and u7 on the working iphone board and it work on that. this is the second iphone thats doing this i have no voltage at c204 if no voltage at c204 phone wont turn on and i am not getting any voltage to cpu, sdram, nand so please help me
thanks in advance Also when phone is connected i dont have any heating part that can say i have short some where

[$ide$step]

99% you overheated cpu while changing display pmu

[d42k11]

I don't think CPU is overheated something else is

[console-maste]

If you want to get best idea, try to replace therms "Схххх" to "PPxVx_хххххх"
Try to operate with voltage language
Its more simple to get best advice

[BadGoose]

d42k11
There must be 1.8V voltage at PP13/PP15 testpoints, at least after power button was pressed! If you measured null voltage at that points, then you have to check if I2C0_SCL, I2C0_SDA is not short-circuited to the GND. Also check if the PP1V8 voltage is present after you press the power button.