Korg Triton Studio locking up in the heat

[Kennyb]

Playing outdoors and my 20 something TS is locking up and throwing codes when I play in the heat of the day.
Usually playing under a tent but very warm out.
It reboots up fine.

This locking up happens when I am scrolling thru my sequences.
Hasn't locked up during a song.
I had this same issue last year. Technician added new and more memory sticks.
Went thru winter ok but now it's doing the same thing.
Any suggestions?
Thanks.
Kb