PS3 Fault finding YLOD with the SYSCON - First steps and Error reporting

[iKon]

When I took out rsx on dia-001 I expected error 1802, but got 0xa0201b02. Is it something interesting? Because I couldn't find any info about that error

My experince with that error removing an RSX COK-001 == 0xa0202120 COK-002 == [SSM] PowSeq Fail : Detected ! & 0xA0201B02

On COK-002 it can be a bad RSX as well bad connection bad VRAM BAD VCORE bad circuit NET but confirm wise if you remove RSX you will get that error on COK-002