A beep sound comes when the printer is in offline mode

lots of words and means just Dead PC. fans spin.
HP model number HP touchsmart. (no model stated at all)
its dead PC and screen is dead.
most PCs from HP have external display port.
of some kind, Display port or others, the manual covers this but your PC model was not told nor service tag model. told.
The PC is dead, and seems the power button is bad too.
here are some steps used on all laptops
1: remove the huge battery in the lap top, do not make excuses how hard it is to unplug , you bought it so do what must be done,
2: use the AC power pack only, (unpugged for 1hour first)
then plug it in, this pack
3: the PC must not self turn on. so push the power button now see it manually turns on.
4 the BIOS HP logo page shows and BIOS screens work like ESC, F10, F11,
5: if screen is still dead, use the external monitor port and
the Fn+F4 button as the manual tells you to do.

no PC stated at all not even class of PC, desk or laptop. and no parts are free.
the TOUCHSMART word does not tell what you own
that name used back to 2007, 13 years long.
IS THIS AND AIO all in one PC,?
does it have a power pack that in in the line cord
is it the right pack for the AIO>?
AIO PCs only have a few parts inside that are standard, RAM and HDD, all else is HP custom, making them as hard to repair as laptops, lacking those parts custom.
first learn to identify a PC first then tinker.
see examples below.

It sounds like your WiFi is not talking to the printer.

Hi,Check to see in the connectioncables are all plugged in correctly.Open the printer and see if drumunit and toner cartridges are installed correctly. Sometimes not well installedconsumables are the cause of that particular problem.See if the print driver on yourcomputer is correctly installed. Try and reinstall the driver.Check if your printer is working in onlinemode. Sometimes printer changes online to offline method. If printer is atoffline mode click Start button on your computer, enter Control Panel. Click onHardware and Sound and choose Printers. Right click on Brother MFC-9840CWD andmake sure that the Use Printer offline is not checked.Hope this helps.

Offline mode means that your phone aint getting any signal from your mobile service provider's BTS. You need to check it from your mobile service provider if there's an ongoing outage, you need to check as well if the sim card is properly inserted. Try powercycling your phone.
1. Turn off your device.
2. Remove the sim, memory card and battery.
3. Wait for at least 2minutes.
4. Plug back the SIM card, memory card and battery.
5. Turn on mobile phone.
6. Check if you are still getting offline mode.
7. If so, try to insert your SIM card to a different phone.
8. If using a different phone for your SIM displays offline mode still,then its your SIM card which is faulty. If it works fine make sure that you inserted the sim properly or the SIM card slot might be faulty.

If the Lexmark printer creates any error message that shows offline mode, you might have to convert the printer to online mode. In order to turn on online mode select the start menu and click on the "Printers and Faxes" icon. This shows you all the printers and other devices that are connected to your system at that time. You might have to double click on the printer icon in order to change it to online. A pop up might come up while performing that and you have to go to printer option in the menu bar of pop up window and have to uncheck "Use Printer Offline."

If this is an USB printer go to Printers windows and right-click the printer, make sure you dont have it on Pause or Offline mode.
If none of these apply, unplug the cable Power Off-On the printer.and plug it in again, this will make ur Device manager to reconnect to the printer.
After all that if problem persist then a reboot a driver reinstall might be required
Hope this helps

In Control Panel - Printers, Right-click the Dell 1710N and remove check for Offline.