As there is really no way to say I definitely know a cap kit will fix your issue, the symptoms you stated sound very similar to bad or going bad caps. Even if they don't fix your issue, it is an easy thing to do and pretty cheap. I would do it anyway. When a cap dies or is dying, it will change its capacitance or take longer to charge and normalize, so this is probably the old caps. Make sure to follow the polarity and be sure if you replace a bi-polar cap, you replace it with a bi-polar cap, that would just cause more issues. I have these documents I dug up when I did mine, I will attach them. These monitors are not widespread so most people haven't even heard of them.
Short answer: yes, it will likely fix your issue, if not you aren't out that much money.