Tektronix 434

[Majorbob]

Hi all, I have an old Tektronix 434 that is behaving oddly. I have a display but it's not drawing in the horizontal at all. It doesn't matter where the time/div switch is unless it's in the micro second range where I don't even get a dot. In the picture is the calibration mode which should have a selection of horizontal lines top and bottom. First picture is the display, second picture is the settings.