Can't edit boot/config.txt

bradleyhollander

@AlexMurphy yes it flashes in quick succeshion

AlexMurphy

@bradleyhollander That means it is working. What sort of display is it connected to? Try a different TV or a different HDMI cable.

DarkWolf

@bradleyhollander the power supply could also be a problem
use one with a minimum of 1A output

bradleyhollander

@AlexMurphy I use a old Vga screen with a hdmi adapter

AlexMurphy

@bradleyhollander Your adaptor is not compatible, sorry.

DarkWolf

Ok that is the problem
The vga adapter disables the hdmi auto detection of your monitor
this can be resolved somehow, let me look into my old pi, I made it there somehow

DarkWolf

Ok so what you have to do:

connect via ssh over network (you need a console for this, however you get to it)
type

sudo nano /boot/config.txt

Remove the # in front of

hdmi_force_hotplug=1

press ctrl+x, enter and than y,enter to save the file
restart your pie with

sudo reboot

if you get no output:
Remove the # in front of

hdmi_safe=1

as well and reboot

Now the hdmi port is forced to be activated and outputting at any time.
This diables composite output, but I guess you don't want to use it.

Hope that helps

bradleyhollander

Composit the yellow plug?

DarkWolf

@bradleyhollander yeah, I guess that was it

DarkWolf

One important thing left:
As the hdmi safe mode is disabled, it could happen that the pi overheats, so keep an eye on it ;-)

I found a great thread for this, so if you need more information you can probably look it up here.

bradleyhollander

@DarkWolf can I do this by editing the config.txt on the sd card

DarkWolf

@bradleyhollander the config.txt file is located on the boot partition of the sd card
you can find the config.txt file at the root

Edit:
Another addition:
First remove the # of

hdmi_force_hotplug=1

and try it out, if you get no output remove the # of

hdmi_safe=1

bradleyhollander

Should I rather get a Vga to composit converter ?

AlexMurphy

@bradleyhollander I'm sorry. I can't help you. I only use HDMI screens.

DarkWolf

@bradleyhollander The result with hdmi to vga will be be much better thatn composite to vga. If you use the composite video output it could output a really low resolution and the quality is kinda bad...
So try the hdmi "fix" and if this doesn't work at all, I would recoment using a hdmi screen more than using the composite output

bradleyhollander

Ok will do thx

edmaul69

Why are people saying to run in safe mode? I understand to troubleshoot but what you really need to do is set the vga to the correct settings for your monitor.

hdmi_group=2

and whatever hdmi_mode for whatever resolution your monitor is. For me my monitor is 1024x768 so mine is set to:

hdmi_mode=16

DarkWolf

@edmaul69 That could be a better solution! I just shared what I die some months ago when I had the same problem.

bradleyhollander

Could it be my power supply I use a Samsung 0.7 amp. will that power a rasp pi B

DarkWolf

@bradleyhollander You should use a power supply with a minimum of 1A (bare minimum). I would recomment using a 1,5A power supply.