technov1king
Posts: 3
Joined: Wed Jun 17, 2020 9:36 pm

connect a raspberry 4 to a DELL CRT monitor

Wed Jun 17, 2020 9:46 pm

Hi All, I'n have a raspberry 4 module running raspbian. This is connected with mini <> normal hdmi cable.
This setup gives a picture on a flat lcd screen

Then i have a DELL CRT monitor type cm2317p
This has a VGA cable, which can be tested and viewed with my normal pc via a VGA <> HDMI cable
This works

Now when i connect it to the raspbery, i get no picture. I tried lowering the resolution on the raspberry but no succes.
What can i do? Thx

fruitoftheloom
Posts: 27225
Joined: Tue Mar 25, 2014 12:40 pm

Re: connect a raspberry 4 to a DELL CRT monitor

Thu Jun 18, 2020 9:05 am

technov1king wrote:
Wed Jun 17, 2020 9:46 pm
Hi All, I'n have a raspberry 4 module running raspbian. This is connected with mini <> normal hdmi cable.
This setup gives a picture on a flat lcd screen

Then i have a DELL CRT monitor type cm2317p
This has a VGA cable, which can be tested and viewed with my normal pc via a VGA <> HDMI cable
This works

Now when i connect it to the raspbery, i get no picture. I tried lowering the resolution on the raspberry but no succes.
What can i do? Thx

A HDMi-VGA Cable will not work, you need a convertor, see:

viewtopic.php?f=63&t=277543#p1680777
Take what I advise as advice not the utopian holy grail, and it is gratis !!

technov1king
Posts: 3
Joined: Wed Jun 17, 2020 9:36 pm

Re: connect a raspberry 4 to a DELL CRT monitor

Thu Jun 18, 2020 9:15 am

That is exactly what is have.! https://imgshare.io/image/img-6332.N2fYT5
I have a raspberry 4 : MINI HMDI <> NORMAL HDMI <> HDMI <> VGA >>>> VGA Monitor

LTolledo
Posts: 6657
Joined: Sat Mar 17, 2018 7:29 am
Location: Anime Heartland

Re: connect a raspberry 4 to a DELL CRT monitor

Thu Jun 18, 2020 10:11 am

have you tried connecting your micro HDMI to HDMI0 (from your picture its connected to HDMI1)

try it!
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"

fruitoftheloom
Posts: 27225
Joined: Tue Mar 25, 2014 12:40 pm

Re: connect a raspberry 4 to a DELL CRT monitor

Thu Jun 18, 2020 10:19 am

technov1king wrote:
Thu Jun 18, 2020 9:15 am
That is exactly what is have.! https://imgshare.io/image/img-6332.N2fYT5
I have a raspberry 4 : MINI HMDI <> NORMAL HDMI <> HDMI <> VGA >>>> VGA Monitor

The 4B is microHDMi !

https://www.raspberrypi.org/products/ra ... fications/
Take what I advise as advice not the utopian holy grail, and it is gratis !!

technov1king
Posts: 3
Joined: Wed Jun 17, 2020 9:36 pm

Re: connect a raspberry 4 to a DELL CRT monitor

Thu Jun 18, 2020 12:02 pm

fruitoftheloom wrote:
Thu Jun 18, 2020 10:19 am
technov1king wrote:
Thu Jun 18, 2020 9:15 am
That is exactly what is have.! https://imgshare.io/image/img-6332.N2fYT5
I have a raspberry 4 : MINI HMDI <> NORMAL HDMI <> HDMI <> VGA >>>> VGA Monitor

The 4B is microHDMi !

https://www.raspberrypi.org/products/ra ... fications/
OK, fine.. i said it wrong. Does not really matter for this question. Please have a look at the picture to see my setup.

I have tried changing the port of microHDMI. No effect.

So i have three monitors next to Raspberry to try it...
- LCD with VGA
- CRT with VGA
- LCD with hdmi

The ones with VGA will not work only the hdmi one... I change the connection..

jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 31354
Joined: Sat Jul 30, 2011 7:41 pm

Re: connect a raspberry 4 to a DELL CRT monitor

Thu Jun 18, 2020 12:34 pm

fruitoftheloom wrote:
Thu Jun 18, 2020 10:19 am
technov1king wrote:
Thu Jun 18, 2020 9:15 am
That is exactly what is have.! https://imgshare.io/image/img-6332.N2fYT5
I have a raspberry 4 : MINI HMDI <> NORMAL HDMI <> HDMI <> VGA >>>> VGA Monitor

The 4B is microHDMi !

https://www.raspberrypi.org/products/ra ... fications/
Please be a little less aggressive. It's quite easy to point something out without explanations marks. It's been happening a lot recently, please calm it down.
Principal Software Engineer at Raspberry Pi Ltd.
Working in the Applications Team.

LTolledo
Posts: 6657
Joined: Sat Mar 17, 2018 7:29 am
Location: Anime Heartland

Re: connect a raspberry 4 to a DELL CRT monitor

Thu Jun 18, 2020 1:12 pm

technov1king wrote:
Thu Jun 18, 2020 12:02 pm
fruitoftheloom wrote:
Thu Jun 18, 2020 10:19 am
technov1king wrote:
Thu Jun 18, 2020 9:15 am
That is exactly what is have.! https://imgshare.io/image/img-6332.N2fYT5
I have a raspberry 4 : MINI HMDI <> NORMAL HDMI <> HDMI <> VGA >>>> VGA Monitor

The 4B is microHDMi !

https://www.raspberrypi.org/products/ra ... fications/
OK, fine.. i said it wrong. Does not really matter for this question. Please have a look at the picture to see my setup.

I have tried changing the port of microHDMI. No effect.

So i have three monitors next to Raspberry to try it...
- LCD with VGA
- CRT with VGA
- LCD with hdmi

The ones with VGA will not work only the hdmi one... I change the connection..
though my monitor is not CRT, it has VGA input
and I've just tried again to connect my other RPi4B-4G to it
RPi4B-4G HDMI0 ---> micro HDMI cable ---> HDMI to VGA adapter ----> Monitor VGA port

and it (still) works

this is the HDMI to VGA adapter that I used for the setup
HDMItoVGA.jpg
HDMItoVGA.jpg (50.15 KiB) Viewed 1969 times
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"

hippy
Posts: 12485
Joined: Fri Sep 09, 2011 10:34 pm
Location: UK

Re: connect a raspberry 4 to a DELL CRT monitor

Thu Jun 18, 2020 1:48 pm

I have not had any problems with my HDMI-to-VGA adapter; I just plugged it in to the Pi's HDMI socket and a VGA monitor and it just worked.

The two potential issues I can think of are that the adapter needs more power than the Pi can provide, though for the Pi 4B I believe that should be able to provide up to 250mA.

The other is that the PI is choosing a video resolution for the adapter which the monitor cannot show. Tweaking 'config.txt' HDMI settings might fix that.

LTolledo
Posts: 6657
Joined: Sat Mar 17, 2018 7:29 am
Location: Anime Heartland

Re: connect a raspberry 4 to a DELL CRT monitor

Thu Jun 18, 2020 8:49 pm

hippy wrote:
Thu Jun 18, 2020 1:48 pm
The other is that the PI is choosing a video resolution for the adapter which the monitor cannot show. Tweaking 'config.txt' HDMI settings might fix that.
I also think this may be the cause of the problem the OP may be facing with the Dell CRT Monitor and RPi4B
try setting the resolution to 1024 x 768 (monitor's native resolution according to CNET is 1024 x 768 85Hz) at the config.txt
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"

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