pcpunk, sounds like your issues are sort of like that of Mint 13, where the Medibuntu PPA has to be removed, or the same error will show.
Only you have two of these, and have to find out the ones that either aren't up for the moment. These are often known dropped PPA's, this happens from time to time, especially when the devs moves onto newer projects, or drops out due to lack of funding. Not that it'll be the first nor last time this has happened.
BTW, is this an extension of your prior Topic, 11 months back? Just so happens, these or both are for the 'precise' (based off of Ubuntu 12.04 distro) also. If so, that's two Topics basically asking the same question. If it's LXLE precise, which hasn't changed in years, why are you asking the same question again? There are always going to be dropped PPA's in older distros, look for the Kevin Mahall one & delete it, see bottom of post.
In regards to the Kevin Mahall PPA, it's dead. Needs to be replaced with another, instructions below.
Edited by cat1092, 29 February 2016 - 11:58 PM.