I hope this is the right section for this question. I have a Vox DA-5 miniature modeling amp. I love it. However, the input for the power supply is jacked. I have taken it apart and looked for broken solder joints where the supply meets the PCB, and they appear (at least) to be intact. It works fine on batteries. But I'd prefer to not run it on stinkin' batteries all the time. Is it worth having someone look at it? Anyone have other ideas?