How to Correct a "CMOS Error"

Troubleshooting problems such as a CMOS error helps you fix your digital camera and keep it performing at an optimal level. You can easily address some of these common digital camera problems.

CMOS Functions

CMOS (Complimentary Metal Oxide Semiconductor) refers to the image sensors in your camera. These sensors convert light into electrons to develop the picture. A CMOS error will show up on your LCD display on your camera when you power your camera.

Correcting Common Lens Errors

Common digital camera problems include picture, display and power problems. The primary problem that manifests as a CMOS error is one that affects the picture. The following steps below address correcting lens errors. The materials you will need include:

  • Lens cleaning solution (specially made cleaning solution for camera lenses)
  • Lint free cloth
  • Bulb blower
  • Small soft bristled brush, like a make up brush or brush for paintings

Step 1 - Take a Test Picture

Take a test shot to use for comparison with another photo that you will take after addressing the lens problem. This will allow you to see if your work has corrected the problem.

Step 2 - Open the Lens Hood

The first place you will look is the lens under the lens hood. Open the hood and then hold the camera up to the light to check for dust or other imperfections such as scratches.

Step 3 - Clean the Lens

Apply a small amount of lens cleaning solution onto a lint free cloth. Using a circular motion, gently rub the lens until the solution is dry. Take a photo and compare it to the test shot to see if this has corrected the problem.

Step 4 - Check the Camera Settings

An incorrect setting on your digital camera can affect the picture and can trigger a CMOS error. Check your picture settings to make sure that you are using the appropriate ones for your subject, setting and lighting. Make adjustments as necessary and take a photo to compare with your test shot to see if this works.

The next steps will address the CMOS sensors in your camera directly if the previous steps have not solved the problem.

Step 5 - Remove the Lens

Consult your camera's manual to remove the lens and open the lens compartment. Remove the lens carefully and set aside.

Step 6 - Remove Sensor Dust

The CMOS sensors are a very delicate component of your digital camera. Make sure to take care when removing the sensor dust. Your camera's manual may list instructions for this process.

If the manual does not include directions, clean the sensors with a bulb blower which blows a puff of air to help dislodge any dust. Use the brush lightly over the sensors to clean up any other dust left over. Do not use a can of compressed air as it has a liquid propellant which can damage the sensors.

 Step 7 - Replace the Lens

Follow the camera manual directions to replace the lens. Take a photo and compare with the test shot to see if this corrects the problem.

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