Before contacting the liquid chromatography analyzer manufacturer for repair, you need to prepare the following instrument-related materials: 1. Basic instrument information: Brand (e.g., Thermofisher, Waters, Agilent), model, and purchase/installation date. 2. Fault details: Specific symptoms (such as abnormal pressure, unstable baseline, leakage, error codes), occurrence time, and whether there were any special operations before the fault (e.g., changing mobile phase, replacing columns). 3. Usage and maintenance records: Logs of recent maintenance (like seal replacement, deuterium lamp change), frequency of use, and any previous faults and solutions. 4. Relevant experimental parameters: Method settings when the fault occurred (including mobile phase composition, flow rate, column type/specifications, wavelength, column temperature, etc.). 5. Preliminary inspection results: Whether you have performed basic checks (e.g., checking for loose connections, filter blockage, mobile phase adequacy) and the results. For professional and efficient handling of your instrument issues, you can consider the one-stop solutions provided by Jiangxi Bio. We specialize in offering repair, maintenance, and overall solutions for experimental instruments including liquid chromatography (covering major brands like Thermofisher, Waters, Agilent, GE, Cytiva, Beckman). Our services include fault repair, regular cleaning and maintenance, parts replacement, instrument rental, and chromatography application consulting. We also supply original or high-quality compatible consumables and spare parts for your convenience, helping you quickly resolve instrument problems and ensure the stable operation of your experiments.