Hi A while back I modded a Sega Nomad. I put in a modern LCD and at the same time I also added two 3.7v LiPo batteries to give 7.4v. These are wired to a LiPo protection PCB and then two the battery terminals and also a new DC input jack for charging. The system works great and gives me plenty of running time. However I have a strange problem with it, I get interference on the screen and also when outputting via the AV out jack. I also get some static with the sound, again both from the internal speaker and through the AV out and headphones. I would appreciate any advice on how I can remove this video/sound interference.