I would make absolutely, 100% sure it is the cable before trying to pull it. I struggled with mine for a year, at both ends trying to see if it was the camera, monitor, or cable.

Long story short, it was a partial, sometimes OK, sometimes not, of both the camera and monitor.

Replaced both, using the old cable still in place and has been working fine for the past two years (around 20,000 miles of continuous use).
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04 Allegro 30DA, WH 8.1, Banks, 03 Honda CRV, Blue Ox Aladdin, Brake Buddy Adv. Select,
300watts Solar, 7 Group 31 Optima AGMs, 2000watt PSW inverter

"Philippians 4:11"