Due to age and/or amount of use, the internal power supply for your BX41/BX45 microscope may have failed. If so, we recommend ordering the following electrical replacement kit, as well as a new lamphouse for your microscope. The updated electronics in the replacement kit will enable your BX41/BX45 microscope to continue to perform for many years to come. AW540700 POWER BD ASSY, for models BX41TF or BX45TF AW540703 POWER BD ASSY, for models BX41TF-5 or BX45TF-5 5-UL1035 U-LS30-4-5:6 V/30 W LAMP SOCKET FORfor BX FRAMEframesS ANDand SZX STANDSstands Please note: Olympus recommends having the electrical replacement kit installed by a trained microscope service or biomed technician. Our Technical Assistance Center can answer your questions, help troubleshoot, or provide installation assistance over the phone at 1-800-225-8330 option 4, then option 1.