Question about Zebra GK420 Thermal Printer

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Alternately Flashing Green and Red - Zebra GK420 Thermal Printer

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Posted on Jan 02, 2017

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SOURCE: I have a Zebra GK420t Alternately Flashing Red and

From the owner's manual:

Alternately Flashing Green and Red: Needs Service 8

8. FLASH memory is not programmed.
• Return the printer to an authorized reseller

You can find the complete owner's manual on Zebra's web site.

Posted on Jul 25, 2011

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SOURCE: Zebra Lp 2844-Z printer flashing green and red alternately?

-Install ZDownloader from Zebra's web.- http://www.ups.zebra.com/ctp/upgrade.aspx visit this page and do nothing to use in step 3 part to download for your stable firmware, only find and download it
-Turn off printer and get ready on Zdownloader sofware-You could see easly "Auto Detect Printers" on ZDownloader, press and hold the label feed button and keep your finger in there then click the "Auto Detect Printers", if you are seeing your printer in list now, continue to keep your finger in feed button-Select the firware.prg file, right click with select your printer in list and click "Download to Selected." -you are still keeping your finger in feed button in this time. You will see the feeding will start and your problem fixed.
Sorry for my english, haven't got enough practice.

Posted on Feb 13, 2012

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You can find the complete owner's manual on Zebra's web site.

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