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Re: print heads go to left grind
The carriage sensor (usually a photocell arrangement) that senses the carriage position when at the end probably has dirt or has failed. It usually is a couple of small black fingers that a "vane" on the carriage goes between. If the vane is broken or the sensor broken the carriage will keep trying to move farther as it cues up. Once it has cued up itself, it counts pulses to the drive motor to keep track of where it is.
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When you put new carts in, it will then clean the print heads. There is an unbuilt system for this in the printer, it will purge ink through the heads to clean them. It does make funny noises sometimes.
Your printer needs a service reset. Epson printers will only accept x number of cartridge changes / print head cleans. Basically it's telling you that the waste ink pad is saturated. It will cost about £30.00 from a local service centre
Take the new cart. out and reinstall the old cart. Does the noise disappear? I would tap and shake the toner cart. BUT BE CAREFULL, the cart is ready to spill toner. On the box and in the instructions it tells you, or should, that you must shake and tap the outside of the cart. This is due to settling and the toner maybe packed. By tapping and shaking it will feel the toner. If the toner is packed it will put undue pressure on the augers inside the toner cart. and cause a grinding noise. If after tapping and shaking, reinstall the new cart. and check. If everything is ok -- great. If the noise remains contact the company your purchased the cart. from and ask for a replacement. These cart. are mass produced and mostly reused ( refurbed). Parts wear now and they do not replace the inside parts, they just repack with toner and seal.
Grinding noise is most likely caused by the carriage lock getting stuck and holding the print head at the home position. The noise is caused by the toothed belt that pulls the head back and forth, skipping over the splines on the motor drive wheel.
If you have been able to print since the problem occurred, chances are that it has freed itself up and will be fine.
Regarding the loss of cyan & magenta output, follow the solution given in my previous posts to complete a manual under-head cleaning cycle. This should get you going.
Check this previous post for cleaning info: