Z87-G43, can't enter the BIOS Setup, system is not running

Question

Hi everyone,
I was working with my pc for about 2 months. Since the very first day i had few problems with mobo but now i can't even run the system and enter the bios. First of all, i had problem with running the system after disabled the MSI logo. I had to enebled it again, because it was the only way to turn on PC (bios stopped at the screen with black screen and a2 code) but it was about 1 month ago. I also remember that from the very beginning option "Hardware Monitor" wasn't working, i mean bios was freezing too and i had to restart PC. Furthermore i have noticed that after choosing language to Polish, few more options in "Settings" appeared, but after switching language back to english they were gone. Unfortunately i can't say now, which one it was because now i got the biggest problem...
BIOS is not running at all. I mean, it all stops with A2 code in right bottom corner of the screen. I can't even enter the bios setup. It shows "Setup is preparing to start" or something like that, but it doesn't run... Can't do nothing atm. BIOS version was the latest - 1.6 . It all started to happening when i had entered to option in bios with disabling or enabling MSI logo, i didn't choose nothing, it freezed, i have resterted PC, and now i nothing is running...  Btw sometimes, i coudn't run the system and bios was freezeing also, if my TL-WN722N wasn't connected to USB port in front case's panel. But now, whenever Tp-LINK is connected or not, it's not running...
CPU: i5 4440
GPU: R9 270x
SSD: Plextor 2,5' 128GB, SATA III ( 520/200MB/s ), 9,5mm (PX-128M5S)   
Power Supply: XFX Pro Series 550W PSU 120mm 80+ (P1-550S-XXB9)   
RAM: Kingston HyperX 2x4GB 1600MHz DDR3 Non-ECC CL9 Intel XMP X2 Grey Series (KHX1600C9D3X2K2/8GX)   

Answer 1

Quote from: badboy2k on 04-January-14, 18:37:20
A2 is IDE detect <--- that is a HDD/SSD problem or its cable (try a different one)
if the above doesn't work try to foll0w >>Clear CMOS Guide<< do that to reset the BIOS to defaults with power cord removed from your PSU!
after performing the above steps make sure you enter BIOS and reset the SATA mode (AHCI/IDE/RAID to what you installed your os at) and boot order to your SSD first!
Ye that's the reason, I have a new brand 1tb sata 3 where I installed the windows, but the old 320gb sata 2 is causing the same error, so I have to remove the cables from the sata 2 hdd, than the pc boots ok. I shutdown & reatach the old drive & evrething works untill the PC enters stand by again.