Taichi x399 : Dr Debug code 90!

[Headrat]

Hi All, (first post so be gentel)

Mobo = Taichi x399

CPU = AMD 1950X

Storage = 1TB Samsung 960 EVO m.2
Memory = 4 x BLE4G4D26AFEA.8FAD (Crucial, on QVL list)
GPU = Vega 64
Cooler = LIQTECH II TR4 240 RGB CPU WATER COOLER - 240MM
Power = EVGA 1600G2

 

I had recently upgraded to the 3.60 BIOS but everything had been running OK, the PC just crashed while unattended last night and now fails to start!

It was working OK before BIOS update but now I get error code 90. I've tried removing/adding back memory, CMOS reset, different GFX cards etc but the sucker will not boot, lots of other codes flip by on the LCD but it ends up at 90 and sits there! (I believe 90 is Boot Device Selection (BDS) phase is starts)
 

I've also just tried to use the "Bios Flashback" to the bridge bios 2.3 and I just get a solid green light which means it didn't work, as per FAQ "If the LED light turns solid green, this means that the BIOS Flashback is not operating properly"

I'm at a bit of a lost what to try next, I know the PSU is also OK as it was running another rig until about 5 days ago!

Thanks

 

Headrat

[Skiiwee29]

Try removing the CPU and re-torquing it down. Its common to see the mounting of the CPU be at fault. 

[Headrat]

OK I can try that but I guess the fact it was working fine before leaves me a little dubious to that solution, I'm not saying your wrong and thanks for the suggestion but it seems a little improbable