MacBook Pro A1707 Not turning on, pulling no current at 20V and low PM BATLOW L signal repair

Problem description

 * 1) incomplete

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Symptoms
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 * Symptom 1 (Figure 1)
 * Symptom 2

Solution
PM_BATLOW_L=0.7V, replacing SMC didn't help. Resolved by reflowing UB000 and U2800