I rarely need to measure that high voltage, CCLF backlit monitors are on the way out anyway.
Thanks for the suggestion. I have 4.7M, 5.1M and 10M, 10pcs each, and will combine them in some way to get the it to measure correctly. As far as I'm aware, those two 5M resistors (R29 and R30) are only for measuring voltage, right? Other things shouldn't be affected?