Please, translate my sentence to English.

He found a crack on the light box of the wall cabinet.

d 字可以有改變, 唔一定要直譯, 例:

發現: discover/observe/notice/note.....
組合櫃:cabinet/wall cabinet/wall unit
光管箱: light box/fluorescent box/fluorescent light box
裂痕:crack/fisure

你按需要自己揀來配搭啦!

He'd found a crack mark on the cover of the plastic cabinet.

He observes a crevice on the film of the light box from the combined cabinet.

He discovers on the wall units the fluorescent tube box film fissure.

He discovers on the combination cabinet the fluorescent tube box film fissure