Sadly I only had this scope. I have a fairly budget lab
I do have a bench supply but its currently wired up with a work project so its kinda awkward to swap things around. I might have to put this onto a possible repair sometime later pile.
I did wonder if it was 1R5 but it was hard to tell.
I have the V1.1 PSU. out of interest is there a schematic for this?
It does look like from a couple of other posts, these same resistors releasing the smoke... So I suspect its a design fault.
I will look deeper into the unit and check the rest of the PCB to see if anything else has gone...
Sadly it happened over night while I left it running in trigger mode hoping to capture an irregular fault were having with a work project. So maybe something did heat up over the long period and just went pop... Again design fault :p