The ornamental design for a stand for electronicboard, as shown and described.
FIG. 1 is a front perspective view of a stand for electronic board showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left-side elevation view thereof;
FIG. 5 is a right-side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a rear perspective view thereof; and,
FIG. 9 is a front perspective view thereof, showing the stand for electronic board along with an electronic board to provide example environment.
The dashed broken lines in the drawings represent portions of the stand for electronic board and example environment that form no part of the claimed design.