ried
Well-known member
I have a Color Classic that has a slightly noisy, high-pitched sound coming from the CRT. Strangely, the display is quiet when the original Color Classic logic board is installed, but the display emits the sound when the Color Classic II logic board is installed. I do not know why the display would behave differently. Changing the resolution or the number of colors (256 vs thousands) has no effect.
The sound is significantly louder when the case is on, too. If I leave the back case off, it's a little quieter.
Any ideas on how I might reduce the high-pitched whine coming from the display when the CCII logic board is in there? It's definitely the display / analog board, and the whine comes from the right side (when viewing the screen).
Thanks in advance.
The sound is significantly louder when the case is on, too. If I leave the back case off, it's a little quieter.
Any ideas on how I might reduce the high-pitched whine coming from the display when the CCII logic board is in there? It's definitely the display / analog board, and the whine comes from the right side (when viewing the screen).
Thanks in advance.