An organic light-emitting diode (OLED) array substrate, a display apparatus and a method for repairing a dark spot of the display apparatus or the OLED array substrate are provided by the embodiments of the present disclosure. The OLED array substrate includes: power lines, a connection component, a pixel structure disposed in a pixel region, and the pixel structure includes a driving transistor, and an OLED device. The OLED device includes a first electrode and a second electrode, and the first electrode is electrically connected with the first source/drain electrode of the driving transistor; the connection component is configured to electrically insulating the first electrode from the power lines before repairing the OLED array substrate; and the connection component is further configured to electrically connect the first electrode (anode or cathode) with the power lines in a case of repairing the OLED array substrate.