Terak Boot behavior?

Hi all -- I've made a small bit of progress with my new Terak. The power supply seems to be working fine, and after going over everything and cleaning the old crumbly foam out, cleaning edge connectors, and reseating everything it now gives the impression that it's trying to boot. (And Al's been kind enough to send me a few images from the CHM, so I have something to try and boot!) However, I've never actually seen one of these in action before, so I have no idea what the expected behavior actually is. I currently get nothing on the display (the CRT is lighting up and if I turn the brightness up I can see a raster, so I know it's at least minimally functional) and I get no sounds from the speaker. The drive seeks back to track 0, pauses for 1-2 seconds and then and seems to briefly access the disk for another second. Then, nothing. Can anyone who has used one of these before tell me if this is anywhere close to expected behavior? Is it possible to get a serial console on these (and is there anything like a PDP-11 ODT prompt?) Thanks, Josh