LCD monitors that accept RGBS at 15.75 Khz?

[John]

Does anyone know of any models of LCD monitor that can do this? I've heard
rumours that some LCS monitors will accept RGBS at 5.75Kh through the VGA
port.

 

[John]

He obtained a "scan converter" board that converted the signal over to
VGA, this worked well (about $120) but in the end it was decided to
source new CRT's as this was cheaper than 12 converter boards, 12 LCD
monitors and the hassle of rebuilding the enclosures to suit them,
while looking neat in a public environment.


I can find out details of the board if you want to buy one.

Thanks, but I know about the rate doublers, I was hoping for a cleaner
solution.

The only other suggestion is that you possibly look at an LCD
television, as they are a TV set, they should run (or internally
convert from 15.75 and if they have a VGA (or other RGB type) socket -
it just MIGHT accept RGB at the frequency you want.

I'd prefer that as well, so I could get the other inputs... composite,
s-video etc.
But I don't want to go around buying TVs just to test if they work the way I
want them to.
I've tried talking to salespeople at JBs and other tv stores, but they don't
know what I'm talking about.
Most of them barely know what a scart plug is.

 

[John]

snip

One other possibility, I recently fixed an LG PVR for a friend at
work, and discovered during the repair that it had a VGA style
connector on the back, but only output 15.75 resolution (couldnt be
changed to VGA). You had to go through on-screen menu to select that
particular output from a choice of AV, HDMI, RGB etc.

If you have access to such a PVR, DVD player, home game console (not
sure but PS 1 or 2 might have been able to support RGB) etc (or can
get from dump sale, garage sale for next to nothing), that can output
this signal you could take it along when buying and plug it in to see
if it works.

Even if it doesnt play, but you can get an on-screen menu coming out
the VGA socket at 15.75, it should do the trick.

For what I want to use (Consolised MVS, snes, megadrive, neo geo AES) I'm
expecting to have to make the cables myself, which gets a bit tricky with no
system to test them on. I wouldn't want to take an untried cable in to test
a TV, if it didn't work there's no telling if it's the cable or the TV.

All very frustrating. Google tells me there are some industrial monitors
that will do what I want, but they all cost silly money. Ideally I'd love to
find a website with a list of RGBS compatible monitors so I can search for
particular models. I'm not too fussed about the LCD's resolution or even
size (17'' would be fine) because everything I'll be connecting up to it
will be pretty low resolution.

 

[David Segall]

But I don't want to go around buying TVs just to test if they work the way I
want them to.

Dick Smith has a "no questions asked", 7 day, satisfaction guarantee
and I assume many other retailers offer something similar.

 

[Ross Vumbaca]

Hi John,

Does anyone know of any models of LCD monitor that can do this? I've heard
rumours that some LCS monitors will accept RGBS at 5.75Kh through the VGA
port.

KR's replies cover it, but since I and others I know have experienced
this requirement with our Amigas, I'll add my 2c of what we have done:

- Use a scandoubler (expensive) or

- Try to use an LCD Television with S-Video input and use a TV modulator
to convert our RGB to S-Video or

- Use an (LCD) television with a SCART input, SCART has been popular in
Europe, and European originating brands like Grundig or Loewe are more
likely to have a SCART port which supports RGB.

Regards,

Ross..

 

[John]

Hi John,


KR's replies cover it, but since I and others I know have experienced this
requirement with our Amigas, I'll add my 2c of what we have done:

- Use a scandoubler (expensive) or

- Try to use an LCD Television with S-Video input and use a TV modulator
to convert our RGB to S-Video or

- Use an (LCD) television with a SCART input, SCART has been popular in
Europe, and European originating brands like Grundig or Loewe are more
likely to have a SCART port which supports RGB.

Regards,

Ross..

Option 3 sounds like the go... it never occurred to me to look for european
brands specifically, for the scart connection.

For the record, just because a TV has a scart plug does not guarantee that
it supports RGB input. Scart is a plug standard, configurable to support any
combination of composite, svideo, RGB and (I think component) but you aren't
guarenteed it will support any one specifically without looking at the
model's manual.

 

[Ross Vumbaca]

Hi John,

Option 3 sounds like the go... it never occurred to me to look for european
brands specifically, for the scart connection.

I own two CRTs with SCART plugs, one is a Thomson the other a Grundig.
Another name for SCART is "Euroconnector" (or "Peritel").

For the record, just because a TV has a scart plug does not guarantee that
it supports RGB input. Scart is a plug standard, configurable to support any
combination of composite, svideo, RGB and (I think component) but you aren't
guarenteed it will support any one specifically without looking at the
model's manual.

Indeed, SCART plugs can support audio too!

Regards,

Ross..

 

[Bob Larter]

Good luck. I tried on some older "diamond view" LCD monitors, they
did display a picture but it was very unstable and unacceptable.

Modern ones I have tried show "signal out of range" or similar
message.

One case locally was a bowling alley that had a 15.75 scoring system,
that ran traditional RGB CRT monitors for the scoring displays.

The 20 year old CRT's had bad screen burn and poor brightness and
colour, and they wanted an upgrade to LCD and ran into same problem.

What you really want for that is arcade video-game monitors.
The OP should talk to an arcade supply/repair company.

 

[Mr.T]

(note used LCD monitors on Ebay seem to go for $150 or less).

You can buy brand new ones for that these days!

MrT.

 

[Mr.T]

you are correct, new ones are ridiculously
cheap when you compare with a few years back.
In this application, the problem with new monitors is that pretty much
all are now wide screen,
this might possibly be a problem with arcade/older console game
(stretched picture), use
unless you can be sure that the picture can be set to 4:3 (in the
monitor, rather than in Windows or the PC) and not stretch and
distort.
Even if this isnt a problem, another issue may be physically fitting a
large widescreen LCD monitor into an existing arcade cabinet (to get
the same screen area that was used with the original CRT) that would
have been made for a 4:3 CRT screen (I dont know if the OP is
planning on doing this). Also if there is existing artwork/bezel
involved, this presents further problems to consider carefully.
On the other hand, these things might not be a problem, depending on
OP's preference and plans, but are worth considering before running
into problems after buying monitors etc.
----------------------------------------


So just buy a 19" 4:3 LCD screen for well under $200 new then. They ARE
still available, (maybe not for much longer, but your list of problems is
definitely premature)
Hell you could even buy a brand new 17" 4:3 LCD a few months back for $100
new, but I think they are all gone now. I'll sell mine for that though.

MrT.