Hello, and two problems!

Howdy, all!

I just subscribed to this mailing list, and although I know it's bad ettiquite
to send a message on the first day, I'm extremely frustrated with the two
problems I'm having, and would really like to start working on them ASAP.

--
Tempest HV: 
At one point I had a working Tempest. Then I got the bright idea to CapKit it
to try to get rid of some "wiggling" in the lines. I was new to arcade machines
at the time, and apparently I lost my senses, too, because I managed to put
a resistor at D901.  (causing R912 to smoke)
So, present day. I decide to figure this thing out once and for all. I put the
original diode back, drop it in and nothing. Not even a part blowing to give 
me a lead. Does anyone have any idea where to start? Is it likely I've blown
the whole thing?
--
Star Wars Deflection:
One day, my Y deflection went away. F1 blew, and a resistor smoked. I was 
advised to replace the resistor and the power transistors. Now I don't
even get a dot on screen.
 
I have a black HV so I'm not too worried there. If I hook up a scope to 
X OUT and Y OUT, I get the game, so I don't think I'm getting anything 
strange stuff from the mainboard. Again, where do I start?
--
I'm almost to the point where I want to just find someone to do the fixing 
for me, but I don't even know where to go for that! All help is appreciated.
--Mike