Display troubles

High tech equipment still keeps giving people some problems. Now my LCD computer display had started malfunctioning. It will not excite the red pixels. That means that the black is okay and the where it should be white is sort a light blue green. It is alright for word processing and anything where color is not important. Checked with Sony and they gave an estimate of $275. That is more than an equivalent display can be purchased. It is almost six year old and Sony has not interest in anything more than seven. It all reminds me too much of our throw-a-way society. It is doubtful that I can repair it without schematics. They are not available.