Dell S2721H Disassembly Manual page 4

Remove electrolyte capacitors (red mark) from
S18
printed circuit boards.
S18-1 Cut the glue between bulk cap. and PCB with a knife.
S18-2 Ensure cutting path within the glue, don't touch bulk
cap. or PCB.
S18-3 Cut into the bottom of bulk cap. and pullit up
carefully.
S18-4 Take out bulk cap. pin solder with soldering iron and
absorber.
S19-5 Lift the bulk cap. up and away from the PCB.
DELL S2721H 4