Hey thanks for the reply. My p6137 probe states that it has 10.8pf of capacitance. I did take the cover off and adjust the other trim pots in the probe box per the manual to no avail.
That is the capacitance from the tip to ground, which is not the same as the scope input capacitance specification.
I hope that you noted exactly where those other trimmers had been set before you fiddled with them. If possible, put them back where they were, as it is non-trivial to adjust the mid- and high-frequency compensation properly (that's what those are). To properly trim them, you need a << 1 ns rise time square wave and follow the procedure in the manual. (A forum member,
Leo Bodnar makes and sells an incredibly fast < 40 ps rise time pulse generator at an affordable price, and it's perfect for doing this. There's a lengthy thread and a mention in a recent mailbag video).
Did you try the other channels? This should help narrow the issue down to one bad input on the scope, or a bad probe. The tip containing the input divider RC network can be replaced (it unscrews from the body, it's #3 on page 10 of the manual from Tek.com) but a new one might cost more than a working used probe. Replacing components in the compensation box might be possible but is not guaranteed to yield proper response. If you suspect a bad probe, and have another good one, you can try swapping the tip and/or the compensation box (loosen the nut completely then just pull the cable out) to further narrow down the issue.