It sounds like your color settings may be different in the two files, or that you are flattening transparency in the new export and should be using the RGB flattener space instead of the CMYK.
Screen shots would help.
I have already tried two ways:
1. updating the document settings to Edit > Transparency Blend Space > RGB to export as PDF interactive
2. using CMYK to export as PDF print
But both still doesn't print out right.
We need those screen shots....
Can you show us the actual PDFs? We might even need to see the .indd files.
The file is 60 pages. I've saved the just 1st page and removed the clients name.
Really appreaciate your patience and help here.
It looks like it's right on the monitor when you do it. What am I doing wrong?
The missing PDF link should be linked to: G Guideline.pdf (the original file)
The correct colour code is C 0 / M 100 / Y 81 / K 4.
But when printed it, it's totally different.
It looks to me as if you've converted the spot color (pantone 186) to process during the export. In the original PDF the background is Pantone 186, and it's still spot in ID, but the second PDF is process. That's something that would have to have been done intentionally by clicking the Ink Manager button in the export dialog.
Previously, the spot Pantone 186 is off in Ink Manager. Will try with it on.
I'm still a bit of a newbie using Indesign. Have a lot to learn.