1 Netgear ProSafe 48 Port Copper M4300-52G-PoE+ Managed Switch. I opened up the switch and cleaned out the inside. The switch would power on. With both PSUs but when I shut it down and turn it back on the PSU would not. I would have to wait and disconnect both PSUs from the unit. Before it would power the switch back on. Both PSUs would do this. One up and the caps seem to be fine. I tested this unit with 2 working PSUs. From another unit I have and it worked just fine. This issue will have to be. Addressed by the new owner. The NETGEAR M4300 Stackable Switch Series delivers L2/L3/L4 and IPv4/IPv6 cost-effective services for mid-enterprise edge and SMB core deployments with unrivalled ease of use: 10/40 Gigabit models can seamlessly stack with 1 Gigabit models within the series, enabling spine and leaf line-rate topologies. Nonstop forwarding (NSF) virtual chassis architectures provide advanced High Availability (HA) with hitless failover across the stack. Intelligent NETGEAR IGMP PlusT multicast allows for scalable Pro AV installations at Layer 2 without the PIM complexity. Dual redundant, modular power supplies equipping full width models contribute to business continuity management. Layer 3 feature set includes static, dynamic and policy-based routing – as standard. The NETGEAR M4300 Switch Series is perfect for wireless access, unified communications and professional AV-over-IP installations. NETGEAR Intelligent Edge Switch solutions combine latest advances in hardware and software engineering for higher flexibility, lower complexity and stronger investment protection, at a highvalue price point. M4300 is flexible enough for mixed stacking between 10/40 Gigabit and 1 Gigabit models, using any 10G/40G port with any media type (RJ45, SFP+, DAC cables). High-availability is another key differentiator for stackable solutions: in case of a master switch failure, NSF and hitless failover ensure the standby switch takes over while forwarding plane continues to forward traffic on the operational stack members without any service interruption. The M4300-96X scales from 8 to 96 ports of 10G Ethernet by multiple of 8 ports, and from 2 to 24 ports of 40G Ethernet by multiple of 2 ports. The 96X lets you start small with copper and fiber, including Multi-Gigabit 2.5G/5G and PoE+ over 10G, and grow later in “non-blocking” mode just by adding port expansion cards. Two half-width M4300 switches can be paired in a single rack space for redundant Top of Rack installations with Auto-iSCSI prioritization. Removing the need for Layer-3 PIM routing, IGMP Plus greatly simplifies system architectures with automated IGMP techniques across the entire AV over-IP network. Entire feature set including L2 switching (multi-tiered access control) and L3 routing (static, RIP, OSPF, VRRP, PIM, PBR) is available without license. DHCP/BootP innovative auto-installation including firmware and configuration file upload automation. Line-rate spine and leaf stacking topologies offer multiple possibilities in server rooms, in branch collapsed cores or at the edge of growing networks. Even if an organization is not ready for high-speed backbone, 10G and 40G models can be added later to stacks of 1G models. With successive tiering, the Authentication Manager allows for authentication methods per port for a tiered authentication based on configured time-outs. With BYOD, tiered Dot1x -> MAB Captive Portal authentication is powerful and simple to implement with strict policies. Please see photos for content and physical condition. Please ask prior to purchasing the computer. Keep in mind, that I mainly sell vintage computers and vintage computer accessories. That said even though the box/item may not show damage, the internal mechanism may have been damaged or jarred from a rough truck and/or plane ride. I will work with ALL my customers to resolve the problem. Personally, I do not think that this is an acceptable way to return items. We are not Walmart or Costco that cannot absorb these financial damages. Thank you for your patronage. I send monitors and huge computers all over the world, including Asia and Europe without issues. Thanks for the interest.