NEC MultiSync BT421 Setup Manual page 4

Installation
Ventilation Requirements
CAUTION: Please use the supplied cables. Use the shielded DVI
cable with ferrite cable cores. Use shielded network cables.
Using any other types of cables could cause interference to
reception.
Connect cables
NOTE: Do not connect or disconnect cables when turning on the monitor's
main power or other external equipment's power, as this may result in
a loss of the monitor image.
Must be under 50 Degree Celsius.
30mm