Does a harpsichord have a soundboard?
Yes. The soundboard is usually made of wood like spruce and is installed in the case. The strings are attached to the tuning pins on one end, then go over a wooden bridge glued to the soundboard and are pinned to a wooden rail glued over the soundboard on the other end with what are called hitchpins. The sound is transferred to the soundboard by the strings vibrating against the bridge (mostly). The strings are plucked when the player presses a key which is really a lever that raises something usually called a plectrum (like a pick for a guitar) which causes the string to vibrate.