Tweeting Sound and no HV from the HV cage

[Jon1967us]

Regarding a 57 Travler table TV, I had the set going last time I powered it up off the Powerite ( which is the only way I power it up). I made some tweaks prior to powering it today, having changed the Horiz AFC diode and replaced the Vert integrator network with a tested NOS one. I also fixed a short on the Vert lock pot.

When I first powered it today, I forgot to plug in the yoke. Would this have damaged anything?

Now I'm not getting HV on the HV lead at the CRT. I'm also hearing a tweeting sound from the HV cage.

Any insights?