Black screen when RPI3 is connected to computer monitor

grant2258

Does your monitor use a laptop like power supply? If so you might be running into a floating ground problem. I had this with a cheap power supply that came with a case I got.

If you have a mobile phone charger try that if the monitor works you need to change your power supply.

mitu

@TheSpottedEagle You should try forcing a resolution and instruct the PI to ignore the EDID info from the monitor (see the hdmi_ignore_edit , hdmi_ignore_edit_audio and hdmi_force_hotplug described in https://www.raspberrypi.org/documentation/configuration/config-txt/video.md).
You can try to find the correct resolution and hdmi_mode by playing from the command line (or via SSH) with tvservice: list the available supported modes and try to switch the resolution using this command until you may be able to display something on the monitor.

What monitor model do you have ? Lastly, since you have the same problem with your laptop, you might want to try another HDMI/DVI cable if you have it, just to rule out a bad cable.

TheSpottedEagle

@Nicky_S14 The RPI3 boots on every monitor expect the one I'm using now. I have also tried re-installing the retropie software but nothing shows up in the screen. I have brand name micro SD card that I bought in person at a local electronics store so it being counterfeit is not the problem. It's a Sandisk 64 Gb. I have also tried another micro SD card with the same issue happening.

I've came with the conclusion that the source of the problem might be the monitor itself. It seems that it's not isolated to one brand of computer monitor but various. I just unfortunately fell into this problem.

TheSpottedEagle

@mitu I've tried that also with no luck. I feel like I've just about tried everything in config.txt. from un-commenting to trying hdmi_safe adding script "hdmi_force_hotplug=1,
"hdmi_ignore_edid=0xa5000080" and so on.

The computer monitor I'm using is 19" Dell model 1905FP. I've ruled out the cables also tried that. So it has to be the monitor. I've yet to find a solution about this but so far I'm having no luck. There's just no one or haven't come across someone having the same issue.

TheSpottedEagle

@grant2258 The monitor is not running a laptop like power supply, it has its own. I've tried another power cord but still nothing works

grant2258

going from experience with this you have a few choices and one i really bad and not recommended (3) .I had problems with the Dell S2440LB.

replace the pi psu with offial one or test with a phone charger before commiting
use the vga port instead
make sure the pi and monitor are sharing the same earth reference since the pi is floating the psu should be taking care of this using option 1

TheSpottedEagle

@grant2258 I tried switching the VGA port using an HDMI to VGA option and it worked! I'm a little confused to why the DVI is having problems getting a signal from devices but... Whatever.
Thank you for the suggestion. I guess it was a bit obvious to solve huh. I didn't think it would be as easy as just switching the ports.

grant2258

get another power supply (a known good one) to fix your monitor if you want the hdmi else just stick to the VGA as long its working for you its all good :)

av999

@TheSpottedEagle
Hi , i have got the same monitor and same issue that no matter what i can not find a solution. Did you manage to sorted out?? I getting crazy to find the source if the issue. Note: stop working just few days ago. I am not using an official psu for the pi. Thanks

grant2258

after investigating a little further i did indeed find another issue i bought a cheapo hdi cable it did work on most other things but not on the pi with this monitor. i think the pi is hdmi 1.3a i would recommend you get a 1.4 compatible cable at the very least.

av999

@grant2258 thanks, i will try it.