I have purchased my second ever Dreamcast. The first one did not work at all

The problem with my 2nd console is that the screen is cropped at the left side

This is the only TV I own for me to test, and I can only choose between the screen ratio (4:3, 16:9), and i cannot zoom in or out. All options give me the same outcome.
Any ideas how to fix this? Is this a common issue?
I've attached a screenshot outlining the issue.
Thanks in advance !!