In German, the term "Kiste", literally meaning "box", is often used as a colloquial derogatory term for electronic and mechanical devices.
It is comparable to "jalopy", which, however, seems to be restricted to automobiles (according to dict.cc).
Is there a comparable term one can put into the following sentences?
I am lucky if this [term for desktop computer] boots without blue screen of death.
Most times this [term for TV set] shows nothing but snow.