Active job

Home Entertainment System

I have a 20 year old entertainment system consisting of 7 sony receivers which control audio and video to 7 different areas of the house. All hard wired with speakers in the ceilings and walls. . 5 of the 7 receivers are either not working or working intermittenly. Need best cost effective solutions to remedy the issues. Not looking to update the whole system, I just need the sound working again in those 5 areas. Receivers are linked to my computer so I just need to be able to listen to the music again. Job is available as soon as the Covid levels permit. Unsure of costs for parts and labour but open to your suggestions. Budget is flexible.