PDP-11/44 problem - RUN stays on

Jay wrote: Jep, I checked the switches, they are set just like you said: 1-2-7 ON, rest OFF :-). I toggled 1-2-7 to OFF an back ON again, but the problem is still here. To clarify, I get only the (Program) line, and then the cursor moves to the next line. I do *not* get the ">>>" console prompt. I haven't looked at the diagrams yet, but ASSuming the M7090 (slot 1AB) does not contain logic and getting the (Program) printed, that board is OK. Except that the voltage comparators might be off, and they keep the system locked? I have at least 4 CIM boards, so a simple check is possible. I also have 3 MFM boards, but I hate swapping if I don't have a good reason/explanation/suspect for a specific baord. Anyway I will swap only one board at a time ... thanks! - Henk. This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.