From a direct view standpoint but most will aply to projos.
Be sure the HV is coming up.
If so be sure the 200V is coming up, its off FBT & feeds
3 video outs.
Check for cold joints around the vert IC. Most Sonys use
+15 & -15 to run the vert. If one is missing the sweep gets
pulled off the screen then shut down. Both also come from
the FBT.
You can also keep starting the set & see if you see a symptom
but be sure the HOT isnt getting to hot.
73 Zeno