I have a Shure SM5B that need repairs. Are there any Shure dealers in the L.A. area or do I have to send it in to you?
Sorry, Shure has not serviced the SM5B model for many years.
If you require electronic/acoustic repair, contact vintage mic collector Jim Webb.
Jim may have contacts to individuals that can repair the SM5B.
Also try: Mooretronix
If you decide to replace the SM5B, consider the SM7B.