I recently bought a Kenwood 570s from a ham operator 2 days ago; after the second day when powering on I would lose recieve and frequency would disappear and just show dots. I reset the rig and everything goes back to normal. How do I fix this issue and who repairs these rigs? I live in Kentucky and I really don't want to have to ship it out. Being new to amateur radio and working towards my license I hope I wasn't duked on this rig and it's a cheap easy fix.