Instrument cluster flickers while driving

[Gilbertsmith]

Hey there! I've got a 2008 base model hatchback here, and for the last year or so I've noticed every once in a while (maybe weekly) the instrument cluster will flicker while I'm driving.

It looks like the backlight goes off and on a few times, like I'm adjusting the dimmer knob, which is always cranked all the way up and "locked" in that notch at the top. The gauges don't misbehave, the LCD stays lit, it's just the backlight by the looks of it, but all of the backlight, not in sections or anything.

I've had the whole cluster out and checked the connections and it all looks fine from what I can tell. Usually it'll flicker for a few seconds and then be fine for another few days.

Any thoughts where I should be looking for this? No other electrical problems (or any problems really) other than this

Thanks!