VAX 4000-200 Boot Problem

I have a working VAX 4000-200 and bought a spare CPU board for it. I plugged in the spare board and it seems to hang when starting the OS boot process. I've included the log below. I looked through the KA660 technical reference and couldn't find what might be hanging at this point in the boot process. I'm assuming that I can simply boot from the same OS image as the original CPU. I compared the few jumpers on both boards and they are the same. I even validated the EPROM contents to be the same. Is the spare CPU board bad or is there something else I should be trying/aware of? You can see from the log here that it does in fact pass all it's tests. Any help would be appreciated before I attempt to return this otherwise great looking board! KA660-A V3.7, VMB 2.12 Performing normal system tests. 95..94..93..92..91..90..89..88..87..86..85..84..83 ..82..81..80.. 79..78..77..76..75..74..73..72..71..70..69..68..67 ..66..65..64.. 63..62..61..60..59..58..57..56..55..54..53..52..51 ..50..49..48.. 47..46..45..44..43..42..41..40..39..38..37..36..35 ..34..33..32.. 31..30..29..28..27..26..25..24..23..22..21..20..19 ..18..17..16.. 15..14..13..12..11..10..09..08..07..06..05..04..03 .. Tests completed. (BOOT/R5:0 DIA5) 2.. -CAP05$DIA5 Normally at this point you get a "1..0.." and then it boots into the OS. But with the spare board, it just hangs after the last line shown above. The EPROMs on both boards are identical as is the board revision and all part numbers.