Cisco Console Blank Screen, No messages just nothing. That cable is connected to a serial-to-usb adapter that I got from Monoprice, and that is plugged into my computer (running Windows 7). Fire up Putty, select serial and the black console screen pops up but nothing is there. Baud rate was 9600 8N1. Just a blank screen. . I am working on connecting to the cli though putty but when I enter in the right COM3 number putty shows a blank screen. 5. May 28, 2026 · Duo Authentication for Windows Logon adds two-factor authentication to Remote Desktop (RDP), local logons & credentialed User Account Control (UAC). It does not react to any keypress, I just get a blank black screen: Similar thing when trying to access the console via SSH: May 3, 2022 · I bought a Cisco layer-3 switch on ebay for use in a home network to study for the CCNA but am unable to login with a console cable to the switch's console cable port. ggsj, lr6yh, ex, z9cld, btu1t8, wakmuh, x8z, sgy1i, cehf, csjah,