After all my re-jigging, I'm left with an 'HD ready' 23" widescreen TV
with a broken digital tuner. It's a Humax LU23-TD2. The line fed picture
is pretty good. So I thought I'd use it as a monitor to replace the
elderly 4:3 one on the 'spare' computer setup. I'm happy with moderate
resolutions.

The spec says it does 4 resolutions - all VESA. It has the standard VGA D
connector.

640 x 480 31.5 kHz 60Hz
800 x 600 37.9 ""
1024 x 768 48.4 ""
1280 x 768 48.1 ""

But I want it to work with an Acorn RPC via a KVM switch as well as the PC
as per the existing setup. It works with the PC (on the resolutions within
its spec) but nothing at all on the Acorn. And I've made up a monitor
definition file for the Acorn to conform to those VESA specs.

Others on an Acorn list have sent me MDFs which should work - but nothing,
just a blue screen with 'resolution not supported'

I'd not be surprised to find a minor timing error which would need further
tweaking, but would love to know why nothing at all.

I've even rigged the the monitor and TV via a pro VGA DA so I can be
absolutely sure the same signal is getting to both. No difference.

Any clues? Obviously all the standard things like sync polarity etc have
been tried. Although that's part of the VESA spec anyway.

--
*DON'T SWEAT THE PETTY THINGS AND DON'T PET THE SWEATY THINGS.

Dave Plowman London SW
To e-mail, change noise into sound.

On 06/02/2014 16:52, Dave Plowman (News) wrote:
After all my re-jigging, I'm left with an 'HD ready' 23" widescreen TV
with a broken digital tuner. It's a Humax LU23-TD2. The line fed picture
is pretty good. So I thought I'd use it as a monitor to replace the
elderly 4:3 one on the 'spare' computer setup. I'm happy with moderate
resolutions.

The spec says it does 4 resolutions - all VESA. It has the standard VGA D
connector.

640 x 480 31.5 kHz 60Hz
800 x 600 37.9 ""
1024 x 768 48.4 ""
1280 x 768 48.1 ""

But I want it to work with an Acorn RPC via a KVM switch as well as the PC
as per the existing setup. It works with the PC (on the resolutions within
its spec) but nothing at all on the Acorn. And I've made up a monitor
definition file for the Acorn to conform to those VESA specs.

Others on an Acorn list have sent me MDFs which should work - but nothing,
just a blue screen with 'resolution not supported'

I'd not be surprised to find a minor timing error which would need further
tweaking, but would love to know why nothing at all.

I've even rigged the the monitor and TV via a pro VGA DA so I can be
absolutely sure the same signal is getting to both. No difference.

Any clues? Obviously all the standard things like sync polarity etc have
been tried. Although that's part of the VESA spec anyway.


No HDMI?

--
Michael Chare

In article ,
Michael Chare wrote:
Any clues? Obviously all the standard things like sync polarity etc
have been tried. Although that's part of the VESA spec anyway.


No HDMI?

The TV has an HDMI input - but neither of the computers have DVI outputs.
I'm wondering if a VGA to HDMI converter would do what I want - cheaper
than buying a new monitor.

--
*I am a nobody, and nobody is perfect; therefore I am perfect*

Dave Plowman London SW
To e-mail, change noise into sound.

On 08/02/2014 00:14, Dave Plowman (News) wrote:
In article ,
Michael Chare wrote:
Any clues? Obviously all the standard things like sync polarity etc
have been tried. Although that's part of the VESA spec anyway.


No HDMI?

The TV has an HDMI input - but neither of the computers have DVI outputs.
I'm wondering if a VGA to HDMI converter would do what I want - cheaper
than buying a new monitor.

You might be able to get a cheap graphics card on ebay.

--
Michael Chare

In article ,
Michael Chare wrote:
On 08/02/2014 00:14, Dave Plowman (News) wrote:
In article ,
Michael Chare wrote:
Any clues? Obviously all the standard things like sync polarity etc
have been tried. Although that's part of the VESA spec anyway.


No HDMI?

The TV has an HDMI input - but neither of the computers have DVI
outputs. I'm wondering if a VGA to HDMI converter would do what I want
- cheaper than buying a new monitor.

You might be able to get a cheap graphics card on ebay.

Not for the Acorn RPC. I do have one - it's called a Viewfinder and does
DVI - on this one, but it's too pricey for what is really just a spare
setup.

I've also not had much success with moderate price PC graphics cards. Have
had several fail.

--
*A bartender is just a pharmacist with a limited inventory.

Dave Plowman London SW
To e-mail, change noise into sound.

On 08/02/2014 00:14, Dave Plowman (News) wrote:
In article ,
Michael Chare wrote:
Any clues? Obviously all the standard things like sync polarity etc
have been tried. Although that's part of the VESA spec anyway.


No HDMI?

The TV has an HDMI input - but neither of the computers have DVI outputs.
I'm wondering if a VGA to HDMI converter would do what I want - cheaper
than buying a new monitor.


A better computer might be the way forwards, maybe a raspberry Pi?

In article om,
dennis@home wrote:
On 08/02/2014 00:14, Dave Plowman (News) wrote:
In article ,
Michael Chare wrote:
Any clues? Obviously all the standard things like sync polarity etc
have been tried. Although that's part of the VESA spec anyway.


No HDMI?

The TV has an HDMI input - but neither of the computers have DVI outputs.
I'm wondering if a VGA to HDMI converter would do what I want - cheaper
than buying a new monitor.


A better computer might be the way forwards, maybe a raspberry Pi?

In what way would it be better?

--
*It's o.k. to laugh during sexŒ.Œ.just don't point!

Dave Plowman London SW
To e-mail, change noise into sound.