Won't print

[Cammyhelms]

I have just Black ink in there and it's an HP Deskjet 3755 the red light next to the display window is blinking and I won't print and I can't figure out why

[Nal_NR]

Hi @Cammyhelms,

Welcome to the HP Support Community

I understand you are facing a print quality issue with your Deskjet 3755 not printing in black. Not to worry I will help you to get a resolution to resolve the issue.

To assist better:

• Does the copy print out the same way? 
• What's the application you are trying to print from? 
• Have you tried printing from a different application or device? 

While you respond to that, let's print a Print Quality Diagnostic page -Post the Print Quality Diagnostic page here so we can help you further.

Let's perform a power drain: 

• With the printer turned on, disconnect the power cord from the rear of the printer and also unplug the power cord from the wall outlet.
• Remove the USB cable, if present.
• Wait for 2-3 minutes, press and hold the power button on your printer for about 30 seconds to remove any additional charge.
• Now plug back the power cable straight to a wall outlet without any surge protector or an extension cord (This is important) and then plug back the power cord to the printer.
• Turn on the printer and wait till the warm-up period finishes and the printer is idle

Update the printer firmware 

• Click here to download and install the latest printer firmware from your product
• Click here to learn different methods of updating the printer firmware. 
• follow the troubleshooting steps  HP DeskJet 3700 Printers - Color or Black Ink Not Printing

Hope this helps! Keep me posted. 

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