How to Fix Epson T0791 Ink Out Error with Flashing Lights

Question:
After resolving an APG issue, my Epson printer now has all the lights flashing with an "Ink Out" error. I'm using new but older T0791 cartridges, and the printer still says the ink is out. The firmware is from 2016. Should I buy newer cartridges, or could something else be causing the problem?

Answer:

When an Epson printer displays all lights flashing with an "Ink Out" error, even though you have installed cartridges, it usually points to a cartridge recognition problem rather than an actual empty ink tank. Let's look at some possible causes and fixes:

1. Cartridge Age and Chip Compatibility

   • The Epson T0791 and related cartridges contain microchips that communicate ink levels to the printer. If the chips are too old or have degraded, the printer may fail to recognize them, leading to a flashing "Ink Out" error.

   • Even though your firmware is from 2016, the age of the cartridges themselves can still matter. Over time, unused chips can lose reliability. In many cases, replacing with newer, genuine cartridges resolves the problem.

2. Firmware vs. Cartridge Chips

   • Epson firmware updates are often designed to block third-party or outdated chips. Since you mentioned your firmware is still from 2016, it's less likely that a new update is causing the error. Instead, it suggests the chips on your current cartridges may simply not be communicating properly anymore.

3. Reseat or Clean the Cartridges

   • Remove all cartridges and carefully clean the chip contacts with a lint-free cloth and a bit of isopropyl alcohol. Dust, ink residue, or oxidation on the contacts can prevent proper recognition.

   • Reseat the cartridges firmly to make sure they lock into place and the chip pins inside the printer make full contact.

4. Cartridge Error Codes

   • A flashing "Ink Out" error is usually accompanied by messages like "Cartridge Not Recognized" (E-01 or E-90 errors, depending on the model) on the printer display or software. These indicate the printer cannot read the chip.

   • If cleaning and reseating doesn't help, the chip itself may be permanently unreadable.

5. Next Steps

   • The most reliable fix is to try brand-new cartridges-ideally genuine Epson, or third-party cartridges with newly manufactured compatible chips. Avoid using "new but old stock" since those may have been sitting unused for years, leading to chip degradation.

   • If new cartridges still don't work, then the cartridge reader pins on the printer may be bent, dirty, or damaged, which would require repair.

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. So, we're not able to provide remote troubleshooting, suggestions, or support for printer repairs. We offer an in-person evaluation and repair service via our local diagnostic facility (https://bchtechnologies.com/printer-repair-service). Given the high demand, we operate on a first-come, first-served basis. It might take a few weeks before we can accept your printer for drop-off. Our services can cover either the whole printer or specific parts, with step-by-step guidance provided. We also understand that our rates aren't the most budget-friendly, so we encourage customers to try self-help first through online resources. You can start by searching our YouTube channel (https://youtube.com/@bchtechnologies) using the search icon near "About" for topics like chip errors or cartridge recognition. This search method is the fastest way to find relevant videos among the hundreds we've created over the past nine years.

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