blank screens after "try Ubuntu" selected

Just created a DVD with Ubuntu 19.10 and aimed to try the Ubuntu install to prove whether or not I have an issue with a new-build PC (on recommendation from the MB supplier ASRock).
The DVD boots but whichever option I select (Try...Install...check disc.. etc.) I get a blank screen and after a minute or so the DVD drive stops churning. Only option seems to be to restart.

The new build was previously working fine with Windows 10 until a couple of days ago when I switched on and just got BSOD's in a loop. Tested memory with MemTest - all ok, specs are:
Intel i3-9100f (no on-board graphics)
Ballistix DDR4 RAM (2 x 4GB)
ASRock B365-HDV motherboard
Asus GeForce GT710 2GB GDDR5
Asus 24D5MT optical drive
GameMax GP500W PSU
Crucial 120GB SSD (for Windows)
Kingston 480GB SSD (for apps etc.)

I re-formatted the Crucial SSD in order to re-install windows after it stopped working.
Reinstall from USB only brought more BSOD's - hence ASRock proposed install of Ubuntu to do diagnosis of system
My thoughts are leaning towards the graphics card, though I have no way of checking if it is faulty or not and no alternative card to try (it's on PCIE).

Never having used Ubuntu before and with no programming knowledge, would appreciate the expertise of those of you who understand the product and may be able to help me get to a point where I can install Ubuntu and get cracking with the system diagnostics.