That could be the problem, however, it does not rule out an issue with the 135v line.
It's unusual for the high power wire wound resistors to go bad, it does happen but it's rare, it is much more often for the candohm resistors to fail before the 25 watt ones, were yours really bad? And what were all the other bleeders replaced with?
However, since you already have the 1.5k 25 watt, what you might think about doing is getting a 12k 25 watt, and hook it in Parallel to the 1.5k, this will get you 1333.33, much more close to the original value.
https://www.mouser.com/ProductDetail...E0g4acOQrU8%3D