When we look into the DLP LCR4500 Flash Programming Guide for detailed step by step to reprogram firmware info on using the JTAG Tools. After we re-programming the firmware, connect the LightCrafter 4500 to a PC loaded with the LightCrafter 4500 GUI via USB, reconnect the power cable to the LightCrafter 4500 and click the Image/Firmware tab and FirmwareUpload tabfrom GUI, the DLP LightCrafter 4500 GUI still shows the wrong for firmware and dosn't work(no image output). We don't know why? Thank you.