Need an Elston analog video board for VT100

[Tony Duell]

> 
> Yeah, I've already tried that.  It didn't fix the problem.  Also, it should
> be noted that Radio Shack's parts area has shrunk to something useless in
> most cases.
> 
> Got any other suggestions? I have no idea what it could be. I've replaced
> the flyback/choke, the PSU, and repaired the analog board.  Only things left
> are the logic board and the CRT.  Maybe I should pull the analog board and
> resolder it? I've got no clue.

You've not even told us what the problem is!. 

Now what _I_ would do is grab the printset (I assume the VT100 printset 
is on the web somewhere...)  and start by checking the PSU outputs. Are they
all correct? 

Then connect a standard RS170 (TV rate) monitor to the video output BNC 
socket. Doe you get video there? Does the terminal seem to work on the 
external monitor. If so, then the logic board is probably working fine.

Now go back to the internal video syustem. Use an EHT probe to check the 
EHT on the CRT anode connector (should be around 12kV I think). Is the 
CRT heater glowing? Check the CRT gun electrode voltages. Do they seem 
sane? 

-tony