I do not remember the color of the compound with which the capacitor is fixed

Сorrosion began just under it, as a result, electronic tracks were dissolved, but it had a much stronger effect on the via metalized holes.
The second (FM50 )monitor was released in 2012, in 2020 the board was destroyed so much that it was not possible to restore it.
So we sent it back to the manufacturer.
P.S.
By the way
Very little information from the topic starter's
But can step by step, if they are present, disable SPO2,NIBP,Lan, interfaces and recorder.
Pay attention to the LED power-on indicator during the loading phase.