Do you know who is able to repair the spectroradiometer ASD Handheld model of 2003 ?Unfortunately Malvern has given up this model and it is not possible to have spare parts, the electronic circuit looks healthy, the instrument can work with a PC but the signal is at zero, the photodiode works and everything else does not look damaged, probably it is an EPRON that lost the program. I do not know how you can re-program because I do not have the circuit diagram, can anyone help me? thanks