Hi SA, since the Cisco Edge 340 is a retired and end-of-life product, Cisco no longer provides or supports ISO recovery images for it, and they aren’t legally available for download from the community. The hardware validation error usually indicates a failing or incompatible component, and even with an ISO, recovery isn’t guaranteed. Your best options are to contact a Cisco partner or reseller who may have legacy resources, or consider replacing the device with a supported model, as Cisco doesn’t offer official recovery media for retired hardware.
