テレビを点け、彼女がブラウン管の前で遊弋している。「おい、飯だぞ？」

、。「、？」

I turn on the TV, and there she is, drifting around in front of the screen. 'Hey, dinner's ready.'

Literal

TV [obj-を] turn-on, she [subj-が] CRT [gen-の] front [at-で] is-cruising. 'Hey, food [emph-だぞ]?'

テレビを点け, with the masu-stem used as a conjunctive, sets up a cinematic narrative present. 遊弋する (ゆうよくする) is a rare, literary verb for 'to cruise / roam' — originally a naval term for a warship patrolling an area, used figuratively here for an aimless drift. ブラウン管 'cathode-ray tube' is the old name for CRT screens, still used idiomatically for 'TV screen.' おい is a rough masculine summons; だぞ is the assertive masculine sentence-ender.