Regarding the professional repair cost for Agilent 8164A optical power meter with no output signal issue: According to Agilent's on-demand repair service information in China, the labor fee includes up to 2 hours of work. If the repair takes more than 2 hours, the additional labor cost is charged at 535 RMB per hour (calculated by the hour). Note that this fee does not cover spare parts and consumables. For your instrument repair and maintenance needs, our company 匠析生物 can provide comprehensive solutions. We specialize in services like repair, maintenance, and rental for laboratory instruments covering brands such as Agilent, Thermofisher, Waters, GE, Cytiva, Beckman, etc. For issues like no output signal of Agilent 8164A, we offer professional repair services along with cleaning, maintenance, supply of spare parts and consumables, and chromatography application consulting. We are committed to providing reliable and efficient support to meet your laboratory instrument needs.