Paveltolz
Доверяй, но проверяй
Stationed in Germany and the service contract on the units' Dell Lap Tops included on site service calls to the base for the first year then parts only for the next two. My side duty as the Company Tech Security Officer (actual title long forgotten) was to accompany the service tech. So, I got to learn how simple they were to work on. I had been building and servicing desk tops on my own for a couple of years so, no fear. When the on site service expired, I just did the work and kept them up and running until they were phased out and new ones came in. Rinse and repeat.