I would remove it from the cluster and handle it as "separated" - https://pve.proxmox.com/pve-docs/pve-admin-guide.html#_remove_a_cluster_node
When it is repaired you would need to join the cluster again. Note that this might not be trivial as...
I have a node with hardware failure, its resurrection has been deferred repeatedly now (soon a year). HA votes are set to 0, quorum and capacity is OK with the remaining odd number of nodes. The rest of the nodes have been receiving updates as...