i cannot connect my deskjet 2620 to the internet , blue light continuously flashing , no key code

[simmo3]

cant connect wirelessley , blue light flashimg contiuously , tried turning off machine , rouiter is working fine , lost key code so cant connect through usb cable either ?

[Jeet_singh]

@simmo3,

Welcome to HP Support Community,

Let's try these steps here - 

Network Restore - Press the Wireless button and the Cancel button from the printer control panel at the same time, and then hold them for three seconds.

If the router has a WPS push button, try these steps to connect the printer to the network -

1) Press and hold the Wireless button on the printer for more than three seconds to start WPS push mode. The Wireless light starts blinking.

2) Press the WPS button on your router.

NOTE: THE MOMENT YOU PRESS THE WIRELESS BUTTON ON YOUR PRINTER, WITHIN 30 SECONDS YOU SHOULD PRESS THE WPS BUTTON ON THE ROUTER.

If this step is not successful, then we need to first connect the printer to a computer using a USB and then convert the wired connection to wireless as the printer does not have a control panel to enter the Wi-Fi password. 

I suggest you uninstall the printer drivers from the root level and then reinstall them by following the below steps:

• Press “Windows key” + “r” to get the “Run” window.
• Type "services.msc" to get Services – Go to “Print spooler” – Right-click and “Stop” the service.
• Now again open "Run" - Type “spool” and ok - Go to PRINTERS folder - delete everything in that folder.
• Go to services again - Start the print spooler.
• Now check for issue resolution.
• If the issue persists, also try clean installing the printer drivers. Here are the steps:
• First, unplug the USB cable from the printer if present.
• Go to Control panel – Programs and feature – Select all the HP Officejet printer entries and uninstall them.
• Now go to Control panel – Devices and printer – Select all the printer entries and remove the device.
• Press the "windows key" + "r" to get the "Run" window open - Type "printui.exe /s" (There is a space between .exe & /) and press enter.
• Under print server properties, go to drivers - remove any entry there as well.
• Again, go to the Run window, type – “c:/programdata” – Go to Hewlett Packard folder, remove any printer related folders & files.
• Restart your computer.
• Please click here (Please select the correct Operating system and version of Windows before downloading and installing the full feature software for this printer).
• Connect the USB cable if prompted and follow the on-screen instructions to complete the installation.

Please refer to this link for steps.

You may also follow this link: HP DeskJet 2600 Printers - Wireless Printer Setup (Windows)

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Have a great day!