Hello friends, I need help with Acuson X300 ultrasound.

I have a problem with a Siemens Acuson X300 ultrasound device, it is showing a shutdown msg. "The system is shutting down automatically to prevent permanent damage, please contact siemens service". The AC source and the DC source seem to be normal, the HD has already been replaced but the problem remains, would anyone have already caught this defect in any repair that can direct me to the problem?