Lenovo B540 ,Starting Problem

[ravi_1617]

Hello !
Model Lenovo B540
Board Details 09244-1
LA14 DIS MB
48.4DMO4.01.1
This Board has starting problem , when CMOS batter is removed ,it starts (turn ON) by itself fine, than if is short power switch once board turns OFF Fine.
when connected CMOS dont start.
3.3 volts present at power switch (it slight less 3.267-87) .there was slight liquid spill at around U53 (SL62872HR),when I clean that area . I mean when its little hot board warm , board starts few time ON and OFF by power switch
One more thing i want to mention ( by mistake i started at 15 volts than i came to know ) , If i give less power from bench power supply range from 13 volts to 16.5 volts , board starts fine even CMOS connected by power switch fine .
What could be causing problem
Found Schematic attached it ,its B450 but matching

Thanks

[SMDFlea]

Hello !
Model Lenovo B540
Board Details 09244-1
LA14 DIS MB

With so little information it`s difficult to help. Please read the beginners guidelines then provide a link to the schematic, the history of the machine and voltage/resistance measurements etc .

https://www.badcaps.net/forum/troubl...r-s-guidelines