Mackie HR624 mk2 won't power up (very often)

I’m having what seems to be a fairly common problem but the common fix didn’t work. One of my HR624 mk2 monitors won’t come out of standby (you could think of it as not powering on), except on one occasion, when it worked fine. I’ve carefully replaced c65 (ok, I did it twice because I wanted to be sure I didn’t cook the first replacement cap and was super careful the 2nd time) and used Deoxit on the main standby switch and the other pots and switches. I get the red LED flash when AC is switched on, and then again when it’s switched off, but no good-to-go white - except once. It worked fine on that occasion, except possibly with some loss of volume (though I might have been imagining that). I haven’t been able to coax it out of standby since that time.

Any other easy fixes to try? Since there does seem to be a common problem with c65 going bad, I am tempted to simply replace all of the caps on the board - there aren’t that many. If that’s the next step, does anyone have a parts list they could share to make for easy ordering? Thanks in advance!

Update: I’m not enough of an engineer to figure out hot to do this, but if there’s a way to bypass the standby feature entirely and have it just power up when AC is applied this would be great as I have the whole monitor rig (HR 624s + sub) on a power strip anyway.