Osiris

Hi y'all, I'm new to these parts so please forgive me if this topic has already been discussed at length. My Ibanez SR500 has recently developed a regular static/electrical popping sound - sorry for being a bit vague but I'm not sure how else to describe it??? The noise it makes is a quick 'pop' or burst of static that lasts a fraction of a second and is no louder that the output from the bass itself. It does it every few minutes or so regardless of whether the bass is being played or is sat on a stand with the volume control fully open - which suggests to me that it is not a loose connection or a fault of that nature. I've systematically checked all the obvious things like a duff battery, dodgy cables etc. and have eliminated all the other components in my rig to be sure that it is definitely the bass that's the problem. The bass is fitted with a pair of Bartolini MK 1 pickups and a Bartolini MK 1 3 band eq. I recently took it in to my local repair man who thought it was a faulty battery clip (which made sense in light of the intermittent nature of the fault). The clip was replaced and the jack socket was also replaced just to be sure. This has helped reduce the regularity of the popping but the bass still does it from time to time. My guess is that it's a fault on the eq circuit, not that I'm an expert on these things!!! Anyone has this, or a similar problem before? If so if anyone can shed any light on the matter it's be greatly appreciated.