New Secondary HDD not detected

[medimuso]

So. Just gonna start with this. I'm not an expert,but have medium experience around PC building. This was my 7th build.
My friend asked me to build him a decent PC,so i ordered it. This morning went after the parts,got back home,started to put everything together (I was working extra carefully & safely on rubber mat,with rubber gloves. Not my pc,didn't wanna pay for accidentally damaging any parts.).

CPU : AMD Rysen 5 1600
GPU : EVGA GTX 1060 3GB
MOBO : MSI B350 PRO GAMING
RAM : CORSAIR VENGEANCE LPX DDR4 2400Mhz
PSU : CORSAIR CX450
SSD : A-DATA 64GB (As main drive)
HDD : SEAGATE BARRACUDA 1TB 7200RPM (As secondary drive)

Now the problem. HDD doesn't get detected in bios,device manager or disk managment on W10. Tries the usual fixes as switching sata ports,they all worked as i tested the ssd on all of them and everything was fine. M-flashed to latest bios,still no change. All drivers were installed properly one by one,restarting the pc between each. My friend already took the pc home as the SDD is working,but asked me to still try and fix it. So now i'm asking for help,since i ran out of ideas what to try. I guess theres a chance it was a flawed unit,but don't wanna send it back so quickly as it would take long time to hear back from them about the problom.

Any ideas for solution?

 

[medimuso]

Hello again. I solved the problem myself.
Asked my friend to hook up the new Seagate Barracuda 1TB HDD to his old computer,it detected it.
So it was working fine with the old one,but not with the new one.
Asked him to use Rufus and install W7 on it and put it back into the new PC.
And now it got detected in bios,device manager and disk managment. Formated it again (just to delete the W7 on it),and now everythings working as it should.
Bit wierd. Apparently new PC has some issues detecting an empty hard drives,but if theres something on it,no problems.
Sorry for wasting anyones time who thought of figuring this one out. You can close this one up.

 

[fredfinks]

curious as to why it wasnt detected. chipset, port/cable or drive? a gremlin