Hi!

This started occurring after visiting an ebay affiliate website,
and I'm wondering if this may be a virus of some sort?

No virus...it'd be very difficult to get ahold of a machine that early
on in the boot process so as to affect the BIOS informational screens.
(If the behavior showed up on a warm boot, there might be a
possibility.

Anything else would require the virus reflash the BIOS, which would
make for a large and complicated virus that had to determine exactly
what hardware it was running, pick a BIOS from its library and flash
the system ROM with it. That's very unlikely to happen...the few
viruses that do attempt BIOS flashing only overwrite the ROM chip with
garbage. This results in an unstartable system.

Your video card has gone bad. It's very likely a problem with the
memory on the card, although graphics processor and other component
failures are possible. Go ahead and replace it.

William