Down again how? Is the CLC LED out again?
If that is still the issue and your power supply and toggle switch have been replaced, use a different board. A repair on something intermittent is hit or miss. If your CLC is a BP4, you must replace it with a BP4. If it’s anything but a BP4, it can be replaced by anything but a BP4. (BP1, BP2, or the old board without a BP #.)