CPU fan stops, works with dif RAM setup but hits EFI Shell/Insert boot media

azocarbo

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Jun 18, 2011
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18,530
MSI Z97 Gaming 7 Mobo
Intel Core i7 4790 @ 3.60 GHz
DRAM Corsair Vengance 16gb (2x8gb) RAM @ 1333 MHz
Samsung SSD 850 EVO 250gb x 2 running in RAID

After not using my PC for 1.5 months I boot up and start watching a youtube video, it then freezes with small horizontal lines all over the dual monitors and makes a whuurrring sound. I hold down the power button.

I check inside the machine but it is all clean, I give it a spray with air and clean out what little dust there is anyway.

Power up and the CPU fan spins for a second but then stops. Nothing on the monitors.

Switched the RAM from DIMM2&4 to 1&3 and the PC will power up (CPU fan working fine) until it gets to a Reboot and select proper boot device or Insert boot media screen.

I can access the BIOS before this screen, I tried resetting to default, and tried changing to UEFI boot instead of UEFI/Legacy boot, but doing this gets me stuck in the EFI Shell. The temps shown in the MSI BIOS screen are fine.

Any ideas please? I don't have a CD drive, or the original Windows disk. I would be happy if I can get the data from my SSDs and then reinstall Windows, but not sure how to get the data. Thanks.
 
Got back into Windows with the RAM in the new slots, I had to change the SATA setting back to RAID.

Any way I can figure out what happened and prevent it from happening again please?