Agilex3 - unknown IDCODE

Hi everyone

We are bringing up an Agilex3 A3CZ100BB18A based board where IDCODE is unknown for the Quartus Programmer. Currently the attached NOR flash is empty. This would be the first time configuration. The labels/texts on the chip seems right and correct and the same part we are trying to use.

Quartus Programmer has proper access to the JTAG chain, but the IDCODE contains some 0xF nibbles

jtagconfig.exe --debug
   (JTAG Server Version 25.3.0 Build 109 09/24/2025 SC Pro Edition)
  F36FF0DD    (IR=10)
  Captured DR after reset = (F36FF0DD) [32]
  Captured IR after reset = (001) [10]
  Captured Bypass after reset = (0) [1]
  Captured Bypass chain = (0) [1]
  JTAG clock speed 1 MHz

IDCODE should be 0x4365B0DD
As you can see there is only minor difference, only some sub ID’s are wrong.
F36FF0DD
4365B0DD

I need ideas what could have gone possibly wrong as in documentation I did not find any explanation to this symptom.

The JTAG interface seems electrically right.
Testing the IDCODE 1000x in JTAG chain debugger of Quartus gives back consistently this very same IDCODE at any startup.


Thank you for your help in advance!

Kind regards,
Peter