Mars Polar Lander (MPL) was a NASA spacecraft launched in
1999 intended to land on Mars, which failed to communicate
after landing.
It was one of two separately-launched spacecraft in
NASA's Mars Surveyor '98 project, the other spacecraft being
the Mars Climate Orbiter (aka Mars Surveyor '98 Orbiter),
which also lost communication,
famously after receiving instructions based upon the wrong units.
Mars Polar Lander instruments:
LIDAR - Light Detection and Ranging (the visible light equivalent of radar).
RA - Robotic Arm.
RAC - Robotic Arm Camera.
MET - Meteorological Package.
TEGA - Thermal and Evolved Gas Analyzer.
Mars Microphone.
Mars Polar Lander also carried two identical
probes, Deep Space 2 A and B, that were released to impact
the surface, to measure descent, impact, soil conductivity, and
detect any water. These also communicated nothing.