Ball loading lane on the left side is jammed

Game not starting, display showing what I presume is an error code

Balls stuck in channel on left of machine; banging isn’t enough to free them.

Number of balls stuck at the top of playfield

Not booting up fully after battery replacement.

Glass and (and possibly playfield) could use cleaning.

http://www.pinrepair.com/sys37/manuals/wms7-hyperball.pdf
See page three of manual for glass removal instructions