Will an iPhone 5S don't turn on if the PMU is completely dead?

Long story short, my baseband would not be read so i couldn’t activate or connect to the network. Decided to try today to reflow U2_RF (baseband PMU). Removed EMI shield, heated it a bunch and put everything back except soldering the EMI shield; just put it in place. Now it will not turn on at all. Is it because of PMU or something else?

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