Hi!! Thank you for your answer.
The problem is, this board (820-199A), has an issue on PP2V5_S0, when power the board all s3 s5 and s0 rails look good, except this pp2v5_s0 that measures 0,15volt.
When i look at the pdf i see pp2v5_s0 comes from u7700 and in the boardview there is no U7700.
I...