Decmate I / VT278 questions

Speaking of VT-100s: Received a Decmate I / VT278 recently (PDP8 micro in VT100 cabinet), sans keyboard and disk drives. I don't really expect to hang on to it, but I'm a little curious to assess it some. Major chips on the processor board: 6120 40-pin socketed PDP8 micro 2* 6121 40-pin socketed PIO 2* 6402 40-pin soldered UART SND 5027 D 40-pin socketed ? (disk controller?) 6* 4-chip RAM modules 23-014G2-00 / M3-6322-9 18-pin socketed ROM presumed 23-015G2-00 / M3-6322-9 18-pin socketed ROM presumed 23-016G2-00 / M3-6322-9 18-pin socketed ROM presumed 23-228E2 / P8316E-37122 24-pin socketed ROM presumed 23088E2 / C68026 DEC 24-pin soldered ROM presumed (character gen?) Board production date: May 19 1983 I suppose a keyboard may not be too difficult for someone to obtain, the disk drives I expect will be less likely; or can anyone comment on what it will take to make this a half-way-useable PDP8 system? I suppose one of the 6402s drives the printer port, what does the other do? The COMM-ports board that sits beside the processor board is missing. Any problem with blowing ROMs to turn the printer port into a boot/download port? When powered on the PWR-OK & CPU-OK LEDs light up and the CRT filament lights up, but there is no sign of any raster. Kind of looks more like the monitor is dead (no trace of beam when powered down for example). I take it (due to absence of physical controls) brightness and contrast are software controlled (I didn't remember VT100 class stuff being like that). Anybody happen to know whether a bare Decmate like this (no keyboard, no disk drives) should display anything on-screen upon power-up?