Question about Lexmark T640dtn Printer

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Hello Team, I have a problem with one Lexmark T640DTN. Message is "USB device unsupported" and red led switched on. Some seconds after restart, situation is the same. Best regards

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Posted on Jan 02, 2017

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2 Answers

Usb device unsupported


We would like to know which usb device is unsupported, please provide more information and we'd be glad to assist you.

For further assistance, please contact Lexmark Technical Support

Aug 25, 2011 | Lexmark T640 Laser Printer

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Hello! I turn on the printer with USB data cable atached to my pc and the Ready led is on. I installed the printer driver from lexmark support site everything beeing ok until now. I try to print from my...


Please try to switch to another usb port or try using a different usb cable. try to unplug and replug the cable and check if the computer was able to detect the printer.

For further assistance please contact Lexmark Technical Support

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I have a lexmark X2470 all-in one printer.I am getting the messarge reading"unsupported cartridge" It is a 3rd party refill.

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1 Answer

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If this is a genuine Lexmark device and a genuine Lexmark cartridge and you followed all the install instructions, return it to where you bought it for a replacement. If you get grief there, contact Lexmark directly. Please have your receipt available when you take these actions.

thanks for your interest in FixYa.com

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1 Answer

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reinstall the cartridge. Turn of the printer leave it for 10 minutes and restart again. If you still have more problem check below link, youmight find some useful info.
http://pc-and-peripheral.blogspot.com/

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1 Answer

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Hello trudyann,
I think you re-filled the cartridge and that's why you got this message
Use genuine cartridge and it will be work correctly.
But if you can copy papers by this All-In-One device .. and you can't use it as printer .. re-install the driver .. While installing if you got error message like [Unsupported cartridge] Press [Alt+F4] and continue the installation.
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I had the same problem and the solution is this: There is a red lever switch by the power chord on the scanner/printer. Above this red lever switch is the drawing of a lock in the "locked" position and at the bottom this red lever switch is the drawing of a lock in the "opened (unlock)" position. The lever on the red switch should point to the "opened" lock symbol (unlock). It the switch lever is pointing to the "locked" position of the lock symbol, flip it to the "opened" position and recycle power on the scanner by removing the power chord for a 30 seconds. If the lever is pointing to the "unlock" lock symbol, flip it to the "locked" position and then back to the "unlocked" position and recycle power. Good luck!

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