The process for obtaining a CNAS certification report for a liquid crystal display (LCD) can be referred to as follows:

1. Determine Test Samples: Based on your application requirements, identify the LCD display samples that need to be tested.

2. Contact the Lab: After confirming the lab can provide LCD screen testing services, contact the lab to discuss specific testing plans and arrangements.

3. Sign Commission Agreement: Enter into a testing contract with the lab to ensure mutual rights and interests.

4. Sample Receipt and Processing: Upon confirmation of sample information by the lab, the samples will be arranged for testing.

5. Inspection Report: The lab will issue a CNAS-accredited inspection report based on the test results.

6. Report Review and Publication: After completion, the report must undergo review and be signed and released by the laboratory supervisor.

Regarding the cost issue, the testing fee for LCD screens is dependent on various factors, including but not limited to the complexity of the testing items, the size and performance of the samples, and the specific model of the LCD screen. Generally, the testing fee is charged according to the laboratory's rates and is delivered with a CNAS-accredited testing report.

When selecting a laboratory, it is recommended to choose one with a solid reputation and qualifications. These labs typically possess advanced testing capabilities and management, ensuring accurate and reliable results. They also guarantee the reliability and reproducibility of the findings. Pay attention to the lab's testing capabilities, service levels, and pricing structure, as well as their service commitments, to select a facility that meets your specific needs.

Additionally, it's worth noting that to ensure the authority and recognition of the test reports, the testing institution for LCD screens must obtain CNAS certification, and the test reports must bear the laboratory's official seal to be legally valid. CNAS is a certification body, and it is internationally recognized as a reputable certification.