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My AOC 17" computer monitor has turned to a yellow/mustard colour

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  • Louie  Role
    Louie Role May 11, 2010

    Hi and welcome to FixYa,

    Initially, post back the exact model number. Offhand, some ideas to explore/consider:


    • if it were a conventional/CRT type, then possibilities are:


    1. video cable. Try replacing or twisting the end closer to the CPU. If that would correct, then a replacement is required. If none is readily available, a temporary workaround is to "wing" the position where it will work and secure the cable in that position with the use of "plastic ties";

    2. color drive transistor. There would be 3 color drive transistors at the small square PCB at the rear of the CRT. One of them could be faulty or cold solder issue. If you have experience with electronics and working in high voltage areas, then try re-soldering the pins of each transistors or replace as needed.


    • if it were an LCD type, then possibilities are:


    1. video cable. Try replacing or twisting the end closer to the
      CPU. If that would correct, then a replacement is required. If none is
      readily available, a temporary workaround is to "wing" the position
      where it will work and secure the cable in that position with the use
      of "plastic ties";

    2. video interface. Internal electronics of the LCD monitor. The best approach would be to access and reference a Service Manual.
    Check and perform preliminary visual or necessary inspection. Pls post back result(s). Good luck and Thank you for using FixYa.

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  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

Initially, post back the exact model number. Offhand, some ideas to explore/consider:

  • if it were a conventional/CRT type, then possibilities are:
  1. video cable. Try replacing or twisting the end closer to the CPU. If that would correct, then a replacement is required. If none is readily available, a temporary workaround is to "wing" the position where it will work and secure the cable in that position with the use of "plastic ties";
  2. color drive transistor. There would be 3 color drive transistors at the small square PCB at the rear of the CRT. One of them could be faulty or cold solder issue. If you have experience with electronics and working in high voltage areas, then try re-soldering the pins of each transistors or replace as needed.
  • if it were an LCD type, then possibilities are:
  1. video cable. Try replacing or twisting the end closer to the CPU. If that would correct, then a replacement is required. If none is readily available, a temporary workaround is to "wing" the position where it will work and secure the cable in that position with the use of "plastic ties";
  2. video interface. Internal electronics of the LCD monitor. The best approach would be to access and reference a Service Manual.
Check and perform preliminary visual or necessary inspection. Pls post back result(s). Good luck and Thank you for using FixYa.

Posted on Jan 13, 2009

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