A display apparatus includes: a first power line, a second power line, an IC region, a printed circuit board region, and a display panel. The IC region includes a logic block receiving a first power voltage from the first power line, an analog block receiving a second power voltage from the second power line, a first IC ground connected to the logic block, and a second IC ground connected to the analog block. The printed circuit board region includes a printed circuit board ground connected to the first IC ground and the second IC ground, a transient voltage suppressor diode including a first electrode connected to the second power line and a second electrode connected to the printed circuit board ground, and a board switch performing a switching operation between the printed circuit board ground and the first IC ground. The display panel is connected to the IC region.