Linksys 5G wireless router with Gigabit and eSATA ports

Linksys WRT1200AC Dual-Band 5G and 2.4G Wi-Fi Router with Gigabit Ports, USB 3.0, eSATA, Power Adapter, and Cables It doesn't work when powered on; a light turns on but it fails to complete startup—I don't know what's wrong with it. Its price is shown on Amazon at the time of posting the listing. Previously it was cheaper, and it's being sold at a higher price now. 150 SAR Specifications Special Features Access Point Mode Frequency Band Class Dual-Band Wireless Standard 802.11ac Compatible Devices Computer, Smartphone, Tablet, Digital Video Game Console Frequency 5 GHz Recommended Use for Product Home Communication Technology Wi-Fi, USB Antenna Type Foldable Operating System OpenWRT Security Protocol WPA2 Number of Ports 3 Control Method Via Application Data Transfer Rate 3 Gbps LAN Port Bandwidth 1000 Mbps Voltage 240 V Controller Type App Control Maximum Data Transfer Rate 1200 Mbps Number of Antennas 2 Coverage Large Household