you could try getting a new power supply if that's really the issue, I've found suitable ones on ebay for <$20. Otherwise if the lsqvl is fried you could get another one and move the disks over without a problem
otherwise all you need to access the data is a linux system with mdadm and xfs_progs installed (these are often there by default depending on the distro) and a way to connect them all. There are 4 bay usb3/esata enclosures I've used for this purpose that you can get for <$100. Then you could transfer the data wherever you want.