Cannot access PC remotely when Monitor is powered off

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Swapped out a tower PC with GTX video card running Windows 10  for a mini
running Win 11 Pro and an AMD Radon video card.  Previously I had no issues
powering off the PC (located in a different room) and connecting via
tightvnc to the tower.  Now, with the Mini, I basically get a black screen
and if an image ever comes up, after login, I have no ability to do
anything.

I have another mini that runs Win 11 Pro, but uses Intel video and it's
headless, no problem with that.

Even pulled the hdmi cable from the problem mini to see if having no
connection might help - did not.  But as soon as I put the cable back in
and powered on the monitor, full access is restored.

I can live with this behavior if there is no other circumvention within
Windows and/or TightVNC.  I've  been pointed to using a virtual display
utility and may give that a try (a physical dongle won't work with my
setup).

Just want to make sure I haven't done something dumb.

-- 
[email protected]

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<div dir=3D"ltr"><div>Swapped out=C2=A0a tower=C2=A0PC with GTX video card =
running Windows 10=C2=A0 for a mini running Win 11 Pro and an AMD Radon=C2=
=A0video card.=C2=A0 Previously I had no issues powering off the PC (locate=
d in a different room) and connecting via tightvnc to the tower.=C2=A0 Now,=
 with the Mini, I basically get a black screen and if an image ever comes u=
p, after login, I have no ability to do anything.=C2=A0</div><div><br></div=
><div>I have another mini that runs Win 11 Pro, but uses Intel video and it=
&#39;s headless, no problem with that.</div><div><br></div><div>Even pulled=
 the hdmi cable from the problem mini to see if having no connection might =
help - did not.=C2=A0 But as soon as I put the=C2=A0cable back in and power=
ed on the monitor, full access is restored.</div><div><br></div><div>I can =
live with this behavior if there is no other circumvention=C2=A0within Wind=
ows and/or TightVNC.=C2=A0 I&#39;ve=C2=A0 been pointed to using a virtual=
=C2=A0display utility and may give that a try (a physical dongle won&#39;t =
work with my setup).</div><div><br></div><div>Just=C2=A0want to make sure I=
 haven&#39;t done something dumb.</div><div><br></div><span class=3D"gmail_=
signature_prefix">-- </span><br><div dir=3D"ltr" class=3D"gmail_signature" =
data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><a href=3D"mailto:steve=
@steveattias.com" target=3D"_blank">[email protected]</a></div></div></=
div>

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