Unknown Printer

Experienced technical support provide their insights in answering this question :
I have had the same problem with Epson px660. I have replaced the main board twice with the same problem recurring after printing many copies of documents..there are some transistors at the back of the main board which when removed the printer will power on but will not recognize the cartridge..so I’m still wondering of the power supply is short circuiting the main board…a

How to Identify and Fix Common Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced technical support :

Ensure that the power cord is correctly plugged into the printer and the electrical outlet. If the power cord is damaged, replace it with a new one. Try to plug the printer into a different outlet to rule out any issues with the outlet. If the power cord and outlet are okay, the next step is to check the power button.
reasons why your new ink cartridge isn`t working properly can be due to the following expired cartridges firmware has been updated rom cartridge model installed the protective tape was not removed incorrect position of color slot of installed cartridges.
Remove all of the new cartridges you had installed and re-install the old (empty) cartridges that worked. Restart the printer, this should remove the not recognised error (and tell you some are empty).
Do a hard reset on your printer. To do this you just need to turn off your printer, unplug for a few minutes and then plug the printer again. If that still doesn`t work, try turning the printer and your computer off, and then start it back up again. Try uninstalling and then reinstalling your printer driver.
Yes, you can reset the print settings to their original, default values. Press and hold down the Cancel button for 3 seconds. When the message to reset the printer to default settings appears, press OK to reset the print settings.
Hey, you can reset Epson ink cartridge without resetter! As shown above, you can reset Epson chips by pressing and holding the button above the chip with a bent paper clip for 10 seconds.
Turn off the ink monitor by checking off the “Disable Epson Status Monitor” found within a box. And lastly, click “Save” and close the window. That`s about it the printer and the cloned ink cartridges can now start printing operation.
Missing colours, streaky prints, smudges and ink blotches are all signs that your printer ink or toner cartridge may be damaged. Some printers will actually warn you if a cartridge is damaged and will refuse to print. This includes HP ink cartridges, Samsung toner cartridges and Canon ink cartridges.
Verify the ink cartridge(s) is inserted properly. Some cartridges snap in place, and if they are not inserted fully, the printer won`t print anything. If a lever is moved from its original position to allow for installation of ink cartridges, ensure it is returned to its original position.
A component found in electrostatic printers, laser printers, and xerographic printers and photocopiers. The fuser unit is used to permanently bond toner to a substrate by applying heat and pressure. A fuser unit is made up of two rollers; one to apply heat and one to apply pressure.
Yes, you can reset the print settings to their original, default values. Press and hold down the Cancel button for 3 seconds. When the message to reset the printer to default settings appears, press OK to reset the print settings.
Printer sleep mode

Check that the printer does not have sleep mode enabled: Go to Control Panel > Devices and Printers. Right-click the printer in question, then select Printer Preferences. Look for an option to disable sleep or time-out mode.

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