Kentmurphy,
Prayers for your loss...
What was the issue that caused you to replace the fuse in the first place? Were you diagnosing or testing your Asteroids?
Either way, you are going have to assess the damage that happened and check it against the board diagram. Hopefully you will
just need to replace the components in a section.
If what you said is true, then it looks like (and probably smells like) your deflection board smoked the diodes on the Y input.
Look at Page 10 of the following link:
http://arcarc.xmission.com/PDF_Moni...Electrohome G05-802 G05-805 Monochrome XY.pdf) on the lower left of the Schematic.
You will see the input for Y and the blown diodes that come after. Guess what else you might be replacing: TRANSISTORS!
http://www.therealbobroberts.net/mon39.jpg
Luckily, for you, the parts are out there. But you should verify that the power from the power supply is good and that everything
else is working in your Asteroids.
If you are lucky, your game plays 'blind' (sound and logic working with the monitor/busted or simply unplugged) and hopefully it's just
your monitor that needs your attention.
Time to break out that Multi-meter...