Sony KP-43HT20 On-Screen Display Problem

For about a year, the on-screen menu has been very hard to see when I press the menu button on the remote.  Previously, the text was a nice bright green, with the multicolor headings at the top (Audio, Video, Parental, etc.) were visible.  Now the text is a very dull brown, and the color headings are not visible.   I just got finished with the STK IC and pico fuse replacements for the infamous convergence problem (thanks to all the great information right here in this forum!).  Now that my convergence issues are resolved, this is my next problem.  Any ideas about what's going on here?  Thanks in advance.