Randy Hick's VT100 trouble analysis of video monitor board

1.  White lines left side - C103

2.  Small characters top row - CR304

3.  Blank, white raster, balloned display - C439 and CR408
        This is a very common problem to find C439 blown, and
    CR408 burned and/or blown.   These components are replaced by...
             CR408     Diode 1N4004
             C439      Electolytic capacitor 75uF, 16V

4.  Skinny letters right side - Q414 and C441

5.  Jumpy screen (alternating fuzzy and clear) - C486 and C487

6.  Very light screen (almost blank) - CR102

7.  Misshapen characters - C103

8.  Very wide characters, horizontal and vertical - CR409

9.  Narrow screen - L402

10. Screen overlap (center) and narrow right - C437