Dear all,
I got an OEC diasonic 9000. It boots up normally but nothings is showing on the two monitors. The display shows E4.

According to the service manuals E4 means image processor has not responded to the host processor over the serial communication link.

I have checked the serial communication already.

Please any help will be appreciated.

Best regards,
DJIELA

Dear Sir
open the cover on the both side of the instrument, you will see a disert, clean it by a pressure air, and take out each one of the slot and also clean it, after that return it on its place and turn on the instruemnt,
I hope this step help you