Can't boot distribution

[Blizzard]

Hi, Thanks for reading this.
I am attempting to run memtest86 on an MSI B350 Tomahawk MB which has the latest bios version. I followed the instructions to create a bootable USB and these completed with no error messages. However, sadly, it will not boot. All I get is a blinking cursor which starts at a slow blink and then blinks faster but no boot.
Here is the configuration from INXI:

System:    Host: dave-MS-7A34 Kernel: 5.0.0-37-generic x86_64 bits: 64 compiler: gcc v: 7.4.0 
           Desktop: Cinnamon 4.4.8 wm: muffin dm: LightDM Distro: Linux Mint 19.3 Tricia 
           base: Ubuntu 18.04 bionic 
Machine:   Type: Desktop System: Micro-Star product: MS-7A34 v: 1.0 serial: <filter> 
           Mobo: Micro-Star model: B350 TOMAHAWK (MS-7A34) v: 1.0 serial: <filter> 
           UEFI: American Megatrends v: 1.OO date: 10/02/2019 
Battery:   Device-1: hidpp_battery_0 model: Logitech Wireless Touch Keyboard K400 Plus 
           serial: <filter> charge: 100% status: Discharging 
CPU:       Topology: Quad Core model: AMD Ryzen 3 1300X bits: 64 type: MCP arch: Zen rev: 1 
           L2 cache: 2048 KiB 
           flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 28001 
           Speed: 1377 MHz min/max: 1550/3500 MHz Core speeds (MHz): 1: 1377 2: 1378 3: 1496 
           4: 3755 
Graphics:  Device-1: NVIDIA GT218 [GeForce 210] vendor: ASUSTeK driver: nvidia v: 340.107 
           bus ID: 29:00.0 chip ID: 10de:0a65 
           Display: x11 server: X.Org 1.19.6 driver: nvidia 
           unloaded: fbdev,modesetting,nouveau,vesa resolution: 1920x1080~60Hz 
           OpenGL: renderer: GeForce 210/PCIe/SSE2 v: 3.3.0 NVIDIA 340.107 direct render: Yes 
Audio:     Device-1: NVIDIA High Definition Audio vendor: ASUSTeK driver: snd_hda_intel v: kernel 
           bus ID: 29:00.1 chip ID: 10de:0be3 
           Device-2: AMD Family 17h HD Audio vendor: Micro-Star MSI driver: snd_hda_intel 
           v: kernel bus ID: 2b:00.3 chip ID: 1022:1457 
           Sound Server: ALSA v: k5.0.0-37-generic 
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Micro-Star MSI 
           driver: r8169 v: kernel port: f000 bus ID: 23:00.0 chip ID: 10ec:8168 
           IF: enp35s0 state: up speed: 1000 Mbps duplex: full mac: <filter> 
           Device-2: Intel Wireless 8265 / 8275 driver: iwlwifi v: kernel port: f000 
           bus ID: 28:00.0 chip ID: 8086:24fd 
           IF: wlp40s0 state: up mac: <filter> 
Drives:    Local Storage: total: 3.06 TiB used: 360.86 GiB (11.5%) 
           ID-1: /dev/sda vendor: Seagate model: ST3300831AS size: 279.46 GiB speed: 1.5 Gb/s 
           serial: <filter> 
           ID-2: /dev/sdb vendor: Western Digital model: WD10EZEX-08WN4A0 size: 931.51 GiB 
           speed: 6.0 Gb/s serial: <filter> 
           ID-3: /dev/sdc vendor: Seagate model: ST2000DM006-2DM164 size: 1.82 TiB speed: 6.0 Gb/s 
           serial: <filter> 
           ID-4: /dev/sdd type: USB vendor: SanDisk model: Cruzer Glide 3.0 size: 57.30 GiB 
           serial: <filter> 
Partition: ID-1: / size: 886.07 GiB used: 81.00 GiB (9.1%) fs: ext4 dev: /dev/sdb2 
           ID-2: swap-1 size: 29.79 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sdb3 
USB:       Hub: 1-0:1 info: Full speed (or root) Hub ports: 10 rev: 2.0 chip ID: 1d6b:0002 
           Device-1: 1-5:2 info: Intel type: Bluetooth driver: btusb rev: 2.0 chip ID: 8087:0a2b 
           Device-2: 1-7:3 info: SanDisk type: Mass Storage driver: usb-storage rev: 2.1 
           chip ID: 0781:5597 
           Device-3: 1-8:4 info: Logitech Unifying Receiver type: Keyboard,Mouse,HID 
           driver: logitech-djreceiver,usbhid rev: 2.0 chip ID: 046d:c52b 
           Device-4: 1-9:5 info: Logitech Optical Tilt Wheel Mouse type: Mouse 
           driver: hid-generic,usbhid rev: 2.0 chip ID: 046d:c019 
           Hub: 2-0:1 info: Full speed (or root) Hub ports: 4 rev: 3.1 chip ID: 1d6b:0003 
           Hub: 3-0:1 info: Full speed (or root) Hub ports: 4 rev: 2.0 chip ID: 1d6b:0002 
           Hub: 4-0:1 info: Full speed (or root) Hub ports: 4 rev: 3.0 chip ID: 1d6b:0003 
Sensors:   System Temperatures: cpu: 44.2 C mobo: N/A gpu: nvidia temp: 60 C 
           Fan Speeds (RPM): N/A 
Repos:     No active apt repos in: /etc/apt/sources.list 
           Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list 
           1: deb http: //packages.linuxmint.com tricia main upstream import backport #id:linuxmint_main
           2: deb http: //archive.ubuntu.com/ubuntu bionic main restricted universe multiverse
           3: deb http: //archive.ubuntu.com/ubuntu bionic-updates main restricted universe multiverse
           4: deb http: //archive.ubuntu.com/ubuntu bionic-backports main restricted universe multiverse
           5: deb http: //security.ubuntu.com/ubuntu/ bionic-security main restricted universe multiverse
           6: deb http: //archive.canonical.com/ubuntu/ bionic partner
           Active apt repos in: /etc/apt/sources.list.d/pmjdebruijn-darktable-release-bionic.list 
           1: deb http: //ppa.launchpad.net/pmjdebruijn/darktable-release/ubuntu bionic main
Info:      Processes: 230 Uptime: 32m Memory: 7.80 GiB used: 3.18 GiB (40.8%) Init: systemd v: 237 
           runlevel: 5 Compilers: gcc: 7.4.0 alt: 7 Client: Unknown python3.6 client inxi: 3.0.32

I hope you can help as I seem to be seeing either memory or processor errors .

[David (PassMark)]

Did you pick the USB drive as the boot device in BIOS?

If yes, can you send the debug log, MemTest86.log, from Memtest86 (assuming the BIOS even started the USB boot process).
https://www.memtest86.com/support/index.htm