[old_tv_nut]

The onscreen display is probably triggered by the h sweep, so it works (mostly) no matter what the frequency is. But the H frequency is far off. Since sync is multifrequency and apparently handled by an IC, this will be hard to diagnose. You would need at least a schematic showing the correct waveforms at the IC pins and an oscilloscope. My guess is this set was probably meant to be "repaired" by replacing a whole board. You could try blindly replacing lytics, without any way of knowing if its one of them or the IC.