Dell 14z-5423 cannot detect ssd but can detect hdd after replacing the motherland.

My laptop is Dell 14z 5423,because of liquid spill, i replace the motherboard.

But now the ssd part of disk cannot be detected (HDD is ok), and when enter bios setup, it shows that mSATA device is None.

Is it mean that the SSD part is broken? The original disk is a Hybrid drive containing 32GB SSD and 500GB HDD. or the motherboard is not suitable?

Thanks in advance.