I have a LCD monitor that is wavy and produces more ripple as the
resolution goes up.
I have just replaced 2 surface mount capacitors, their ESR ( using Dick
Smith meter) readings are 88 and 97 respectively, so there must be bad
..
However, the monitor is still wavy after the repair.

There are couples of 16V 10uF that goes around 10-17, and according to
the chart on the meter , good rating should be around 1.6

Question1: What ESR value is considered to be bad? How many times the
bad one has to be larger than the good value on the meter's chart?

Question2: Is it possible that the ripple is caused by something other
than the dying capacitors?