Tektronix 2465B oscilloscope with front cover. In principle, the oscilloscope is running, but the test signal from the built-in calibrator is distorted and not rectangular. I measured the signal on another oscilloscope and it remains distorted. See last picture! With a generator, all channels are clean and clear. The screen has a large brightness reserve. The self-test runs without errors.
Due to its age, incomplete testing and the defective calibrator signal, I am selling the device as defective with partial functionality. Nothing else checked.