Ludwig and Stan,
Thank you both for your reply. I went ahead and checked the resistance for all the pins related to the two SMPS boards and there only appears to be one point of note. When testing the main PCB without the SMPS boards pluged in the GND to VCC on the pins for SMPS board 1 start off at a low resistance of about 400 ohms then quickly climb to about 50k ohms. Checking GND to VCC on SMPS board 1 shows about 800k ohms.
I was having some trouble fully understanding the test setup for the SMPS boards and did not verify with the instructions you sent. I will however note that the boards are brand new replacements and should in theory be working as expected.
