It might distract you in meditation, since most electronics generate noticeable things that may distract you, like high-pitched, constant sounds. As far as I can tell there really isn't an effect, but even if psi phenomena is not messed with by EM radiation, your brain very well could be, and that could indirectly affect phenomena.
The molecular nature of biological systems is based upon microphysical and macrophysical interactions in which the collective movement of microphysical interactions and various types of stochastic processes can cause qualitative shifts. A small amount of particles in a homogeneous phase(most complex organic molecular structures are heterogeneous which results in a type of self-assembly) depends on the stochastic collisions of individual molecules, thus, the trajectory is more of an approximation and probabilistic. In organic systems, you get an arrangement where a chain reaction or a cascading effect can happen, but you generally get horizontal and vertical processes limiting this behavior via a type of asymptote. This is especially true with neural networks and stimuli in sensory based things, for it can cause a phenomenological shift. For example, molecular perturbations concerning chemicals associated with pigments in optical receptors can change perception and thus behavior. Psi mediates a template of information which causes qualitative shifts in the brain of the person leading to perceptual shifts(it is qualitative because there is no exact visible boundary since it is measured via an arbitrary exactness even though this boundary is not visible; it is a prediction). It would cause distractions in recognition of this information, but it would not stop the information from causing shifts in the brain. By "information" I mean a description of a complete set of parameters/descriptions that describes the position, the momentum, and the evolution of states which alters the trajectory of the particles involved coordinating their movement. This is fed into the the physical makeup of the person's brain. A distraction helps to distract awareness, but it does not block the change in the physical states of the brain anymore than tapping a person lightly on their shoulder while screaming in their ear removes the physical response to the tap on the shoulder even if they did notice it.
In experiments dealing with the intentional influence of a person's biological functions, it seems that people are able to block it via a type of conceptualization/intention to not let it within empirical studies, thus, as far as we know, the only thing that can block psi is the intentionality of other organisms.
DISTANT INTENTIONALITY AND HEALING:
ASSESSING THE EVIDENCENow, affecting the functioning of electronic equipment is more likely and quite common. In experiments dealing with instruments used to measure radiation, it seems that this radiation is skewed in relation to the physical manifestation of psi. Placing something like a Geiger counter near the target of the person to be healed would yield a skewing in the radiation in relation to the healing of the patient. Off the top of my head, I believe Dean Radin did experiments like this. That being said, electronic devices are more likely to be impacted by psi than the performance of the person.
In addition to that, a person can be selective in the information they want, so a person can choose to get information about an object and not the ringing that Mech's device is set to induce. As far as we know, there is no physical way to block whatever is responsible for allowing this phenomena to be possible outside of the intentionality of "conscious" beings. Saying humans may be a little inaccurate considering that experimental evidence has shown that a minimal level of psi functioning is possible with dogs, parrots, and chicks at least.
So, to answer the original posters question, no electronic devices do not have an impact on the dynamics of psi where it is usually the other way around.
For example, with me, my abilities are strongly tied to my emotions, so strong emotions can trigger electronic devices frying, blowing up, turning on, or, in the case of some monitors, showing intense discolorations.
