Screen not working

[pabloalcantara]

Hi,
The display is not working anymore. It worked for more or less 2 days, then now it shows only an icon o a monitor with a cross in it. I'm using the 2.0.9 version
I know it's not the output of my pc, because taking the hdmi cable and putiing in a monitor, it works perfectly.

[ep1cman]

I just had the same issue with a device. I reflashed the SD card, it still didn't work. Once I did an update though it came back alive.

[pabloalcantara]

I just had the same issue with a device. I reflashed the SD card, it still didn't work. Once I did an update though it came back alive.

I´ll try to reflash.

[Igor-M-77]

I have a similar problem. HDMI stopped working after half a day. I have two nano kvm devices. The second one works if I use it. If you managed to solve the problem, then tell me where I can find instructions for reflashing?

[ep1cman]

I have a similar problem. HDMI stopped working after half a day. I have two nano kvm devices. The second one works if I use it. If you managed to solve the problem, then tell me where I can find instructions for reflashing?

Take the four screws at the bottom off and there is a micro sd card. You can find the image to flash to it on the release page of this GitHub repository. Bare in mind it’s compressed, I’d recommend a tool like “balena etcher” which can decompress it and write it to the sd card

[Igor-M-77]

I have a similar problem. HDMI stopped working after half a day. I have two nano kvm devices. The second one works if I use it. If you managed to solve the problem, then tell me where I can find instructions for reflashing?

Take the four screws at the bottom off and there is a micro sd card. You can find the image to flash to it on the release page of this GitHub repository. Bare in mind it’s compressed, I’d recommend a tool like “balena etcher” which can decompress it and write it to the sd card

It worked after reflashing and updating. I was already starting to worry that it was a hardware problem. Thank you.

[pabloalcantara]

Reflashed. But still hit and miss...
Some times works, and some don´t..After a lot of reboot.

[marshalleq]

Just had this happen too, it seems to come right by itself sometimes. This time it isn't. Refreshing is a bit extreme, we probably need to find out what is causing this....

Adding a bit of info, for me this happened after rebooting (and possibly a hard reset). Further reboots have not changed the situation. My guess is that it's perhaps being caused by the GPU thinking it has not monitor or the reverse. The system is up and running well as is the KVM, other than it not displaying anything. Everything else works.

[patschi]

I have had the same issue in the past. Somehow a random mixture of power-resetting, re-attaching HID and HDMI fixed it. But only seen it once so far...

[pabloalcantara]

I think I discovered the possible problem USB power. My device is the light one, so is using power from the USB, maybe, only maybe, the USB can´t delivere the necessary power.
Ony one know how to use an external power supply on it using the pin headers?
I know that it have 3 power pins: vsys 5v, vbus 5v and 3v3 and 2 ground pins. Some time ago i played with arduino, and I have an external power suply that can output 5v or 3.3v, and I have all the necessiry cables. But I don´t know witch power pin I can use.

[haggis-supper]

I think I discovered the possible problem USB power. My device is the light one, so is using power from the USB, maybe, only maybe, the USB can´t delivere the necessary power. Ony one know how to use an external power supply on it using the pin headers? I know that it have 3 power pins: vsys 5v, vbus 5v and 3v3 and 2 ground pins. Some time ago i played with arduino, and I have an external power suply that can output 5v or 3.3v, and I have all the necessiry cables. But I don´t know witch power pin I can use.

I had the same problem with my nanoKVM Lite.
So i've done a couple of things

1. Reflashed the SD card ( went here and pulled down the 1.2.0 version images as i noticed when i looked at the "About KVM " pulldown it showed image version 1.0.0 )
2. I then used the option in the KVM to "Check for Update" which updated me from Application version 1.0.0 to 2.0.9.
3. Got a shorter USB-A to USB-C cable ( 0.5m )

Now it seems to be working ok.

[marshalleq]

I thought mine is plugged into an external power source, but I've just seen that it isn't. So it could be something... No idea why that makes it lose its marbles though. I wonder if just external powering it is enough to sort it on its own. Somehow I doubt it but I really don't want to have to pull it all apart again to get the card out....

[kcastner]

My devices expand the view to the NanoKVM. If i set it to mirror, the NanoKVM wont show any HDMI output anymore.
Same problem at changing screen resolution on host system.

I have to reboot the NanoKVM to get it working again.
It seems that the video input wont be reenabled after any input change. Replug wont work either.

Can anyone reproduce this problem? I think its related to it.

My current workaround: open NanoKVM terminal via GUI and type "reboot"