Bose Headunit Blackouts

For the past couple of months the Bose headunit on my '95 maxima has been blacking out. I've taken it to a shop and they say told me my head unit is completly blown. What is the cheapest way to get my radio working again without buying a new headunit and speakers and wiring?

I have a Bose head unit for a 1995-1996 the sound doesn't work on it but i am willing to sell it for parts. Contact me at [email protected]