Problemas para selecionar los tranductores

Hola a todos. Ultrasonido ATL HDI 3000. I need help, this equipment was working properly, at this time when I turn it on at the end of the boot process it does not show me the sweep and does not allow me to select any transducer, when I select the SCAN HEAD key I get the screen to select the transducers but practically without information, 4 boxes appear above without any information inside and below another box appears with the name Tissue Specific Presets but also without any information. Please someone can tell me to refer this problem to and how I can solve it. Thanks a lot. I measured the voltages of the sources ps1, ps2 and ps3, note that ps2 and ps3 are present voltages, in ps1 +/- 15vdc and +/- 6vdc, in tp8 I have 155 vdc and in tp1 and tp2 I have +/- 31vdc. Will this be correct? thank you