Yes, replace the associated capacitor, which IIRC is in fact C30.
I haven't done all the research on this, but if you are referring to vertical bars, missing 12V has caused that on my TZ. I'm theorizing that one of the dot manufacturers requires 12V but the other does not.
When you remove C30, be very careful. Through holes can easily be pulled. If pulled either use a solder stitch to fix or (gasp), run jumpers.
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Chris Hibler