Epson WF-7610 Error 0x9A: Can Refillable Cartridges Cause It, or Is the Printhead or Mainboard Faulty?

Question

I received an Epson error 0x9A on my WF-7610 while using aftermarket refillable cartridges. I initially thought the mainboard or a cable had failed, but the error appears to depend on how firmly I install the cartridges.

When I press firmly on the rear of a cartridge near the locking tab, the printer immediately displays error 0x9A. However, when I insert the cartridge gently and stop as soon as it clicks into place, the printer starts normally and allows me to print after I acknowledge the non-genuine ink warnings.

Could an incorrectly sized refillable cartridge or its chip connection be causing the 0x9A error, rather than a damaged printhead or mainboard?

Answer

The 0x9A error on Epson Workforce printers such as the WF-7610 and WF-3640 is generally associated with an electrical or electronic problem. Common causes include a shorted or internally damaged printhead, contaminated printhead contacts, a damaged flexible flat cable, a failed printhead driver circuit, or damage to the printer's mainboard.

Therefore, this error is not normally treated as a standard cartridge-recognition problem. A typical cartridge issue usually produces a message such as "cartridge not recognized," "ink cartridge error," or a warning about non-genuine ink. Error 0x9A normally indicates that the printer has detected an abnormal electrical condition during initialization.

However, your observation should not be ignored. If pressing firmly on a particular refillable cartridge consistently causes the error, while gently seating it allows the printer to operate, there may be a mechanical or electrical interaction involving the cartridge, its chip, or the cartridge-contact assembly.

How an Aftermarket Cartridge Could Affect the Printer

Aftermarket refillable cartridges sometimes have small dimensional differences compared with genuine Epson cartridges. The plastic shell, locking tab, chip position, or chip thickness may be slightly different. Even a small difference can change the pressure placed on the cartridge chip contacts inside the carriage.

If excessive pressure causes the cartridge chip to move, tilt, or press against the contact pins incorrectly, several problems may occur:

• Two contact pins may touch each other.

• A bent pin may contact the wrong chip pad.

• The cartridge chip may be pushed out of alignment.

• The cartridge body may flex the cartridge-contact board.

• Ink contamination may be compressed across adjacent electrical contacts.

• A damaged aftermarket chip may behave abnormally when pressure is applied.

Any of these conditions could potentially create an electrical fault that appears during startup. While this is less common than a damaged printhead or mainboard, a repeatable pressure-related symptom makes the cartridge or cartridge-contact area a reasonable part of the diagnosis.

Why the Printhead and Mainboard Still Need to Be Considered

Even if the printer currently works when the cartridge is installed gently, that does not completely rule out a developing printhead or mainboard problem.

The cartridge chips communicate through the carriage's cartridge-contact system, while the printhead is powered and controlled through separate flexible cables and driver circuits. Excessive pressure on a cartridge may slightly flex the carriage assembly or disturb an already damaged connection. In that situation, the cartridge may not be the original cause; it may simply trigger an existing electrical weakness.

A printhead can develop an internal short because of moisture, ink intrusion, corrosion, overheating, or damaged internal circuitry. When this happens, the printhead may draw abnormal current from the mainboard. The mainboard's printhead driver components may also be damaged at the same time.

For this reason, replacing only the mainboard without identifying the original cause can be risky. If a shorted printhead remains connected, it may damage the replacement board as soon as the printer powers on. Likewise, installing a new printhead on a mainboard with a damaged driver circuit may damage the new printhead.

Inspect the Refillable Cartridge Carefully

Because the error appears to depend on cartridge pressure, compare the refillable cartridge with a genuine Epson cartridge or another known-good cartridge whenever possible.

Examine the following areas:

• The position and height of the cartridge chip

• The shape and length of the rear locking tab

• The overall cartridge height

• The angle at which the cartridge sits in the carriage

• Whether the cartridge rocks after it clicks into place

• Whether the chip is loose, cracked, scratched, or contaminated

• Whether the cartridge shell has excess plastic or molding defects

A cartridge should click securely into position without requiring excessive force. Pressing harder after the locking tab has engaged should not be necessary. If the cartridge sits too high, too low, or at an angle, discontinue using it rather than repeatedly forcing it into place.

Inspect the Cartridge Contact Pins

Turn the printer off and disconnect it from power before inspecting the cartridge area. Use adequate lighting and look at the small contact pins that touch the cartridge chips.

The pins should appear evenly spaced and aligned. Look for:

• Bent or crossed pins

• Pins pushed farther inward than neighboring pins

• Dried ink on the contacts

• Corrosion or discoloration

• Broken plastic around the contact holder

• A contact board that moves when light pressure is applied

Do not scrape the pins aggressively or bend them with a screwdriver. These contacts are delicate, and a minor alignment problem can become permanent damage very easily.

If ink is present around the electrical contacts, allow the area to dry completely before reconnecting power. Moisture or conductive ink residue can create a temporary or permanent short circuit.

Test With a Known-Good Cartridge Set

A useful diagnostic step is to test the printer with a complete set of cartridges known to fit correctly. Genuine Epson cartridges are generally the best reference because their dimensions and chip placement match the original design.

If error 0x9A never returns with a known-good cartridge set, but immediately returns with a particular refillable cartridge, the aftermarket cartridge, chip, or fit is strongly implicated.

If the error continues with genuine or known-good cartridges, the problem is more likely to involve the printhead, the carriage wiring, or the mainboard.

Do not repeatedly power-cycle the printer if the error persists. Repeated startup attempts can place additional stress on an already compromised electrical circuit.

Check the Printhead Cables and Carriage Wiring

The printhead is connected to the mainboard through flexible flat cables. If one of these cables is contaminated, creased, partially disconnected, or installed at an angle, it may cause an electrical error.

The cable ends should be inspected for:

• Burned or darkened contact traces

• Ink contamination

• Corrosion

• Torn conductors

• Creases near the connector

• Uneven insertion into the socket

Disconnecting and reconnecting these cables carries a significant risk. A cable inserted crookedly can short adjacent contacts and damage both the printhead and mainboard. Anyone without experience handling Epson printhead cables should avoid disconnecting them solely for experimentation.

Distinguishing a Cartridge Problem From a Printhead Failure

The pressure-related behavior you described provides an important clue, but it does not prove that the printhead is healthy.

The cartridge is more likely to be responsible when:

• The error occurs only with one specific cartridge.

• The error changes immediately when that cartridge is repositioned.

• A genuine cartridge set works consistently.

• One cartridge chip is visibly loose or misaligned.

• The carriage contact pins are bent or contaminated.

The printhead or mainboard is more likely to be responsible when:

• Error 0x9A appears even with all known-good cartridges.

• The printer displays the error before cartridge checking begins.

• Ink or cleaning fluid has reached the printhead cables.

• The printer previously experienced a printhead short, overheating, or liquid spill.

• Burned components or damaged cable contacts are visible.

• The error becomes permanent regardless of cartridge position.

Based on your description, we would not say that the cartridges have "nothing to do with" the symptom. A poorly fitting cartridge or misaligned chip could potentially trigger an electrical fault at the cartridge-contact assembly. Nevertheless, error 0x9A remains serious because it can also indicate a shorted printhead, damaged printhead cable, or failed mainboard circuit.

The safest approach is to stop using the cartridge that requires unusual positioning or pressure, inspect the carriage contacts, and test with a known-good cartridge set. If the error continues, the printer should be evaluated electrically before replacing either the printhead or mainboard.

Addressing printer issues can be complicated because many faults require direct, hands-on inspection. For that reason, we are unable to provide individualized remote troubleshooting, repair instructions, or technical support for printer repairs. We do offer in-person evaluation and repair through our local printer diagnostic and repair facility [https://bchtechnologies.com/printer-repair-service]. Due to high demand, the facility operates on a first-come, first-served basis, and it may take several weeks before an appointment or drop-off becomes available.

Our services are structured to evaluate and repair either a complete printer or certain removable components, with instructions provided on the service page. We also recognize that professional diagnostic work may not be the most economical option for every printer. Therefore, we strongly encourage customers to begin with independent online research.

You can search YouTube or visit the homepage of our BCH Technologies YouTube channel [https://youtube.com/@bchtechnologies]. On the channel page, use the search icon near the "About" section to search for a particular printer model, error code, or repair topic. We receive many requests each day asking whether we have a video covering a specific issue. Since we have produced repair videos for more than nine years, it is difficult to remember every video individually. Using YouTube's channel-search feature is usually the fastest way to locate relevant material, and YouTube may also recommend helpful videos from other creators.

Thank you again for taking the time to document your experience and share the relationship between cartridge pressure and error 0x9A. Detailed feedback like this can help other printer owners recognize unusual cartridge-fit and contact problems while also understanding the possibility of a more serious printhead or mainboard fault. We sincerely appreciate your support of BCH Technologies.