🚀 go-pugleaf

I was using my computer (XT clone, TTL mono monitor) the other
evening, when suddenly I heard a short cracking noise, and the
screen went dead.  The computer still works fine (I used the
printer), but testing the monitor on another computer showed the
same problem.  I tryed adjusting the brightness pot on the circuit
board, and I am able to see an amber screen - but no computer signal.

Obviously, my real problem is trying to get the monitor working, but
I think I may be on to it.  On the small board connected to the CRT,
there are four small gray components connected to the CRT connector
with the board designations SG1, SG2, SG3, and SG4.  One of these
has a hole in one corner and a bulge on the top as if toasted itself.

My question is first whether someone can identify these components,
(they have SG written on the side), and secondly, can someone say
whether the presumably damaged component would cause the problem I
am having.  I have absolutely no idea what these components are or
where I would get replacements.  

Also, it any of you knowledgable souls out there have solutions to
similar problems as this, I would appreciate your response, :-)

Oh, by the way, the monitor is a TTX 1202 manufactured by Korea Data
Systems. 

Thanks in advance.  :-)

-- 
Brad Cameron          uucp: decvax!utzoo!dciem!nrcaer!cognos!bradc
Cognos Incorporated   mail: P.O. Box 9707, 3755 Riverside Drive, 
 (613) 738-1440             Ottawa Ontario, Canada. K1G 3Z4