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So I've attempted to follow the links from R-Pi Troubleshooting. I can't discern a pattern. I see a solid green, short off, long solid green. Then intermediate green flashing for hours, it feels like a successful boot happened.

Here is a video of the Start up. I'm not sure what is happening after ~30 seconds the green light shuts off and will just randomly blink on/off which shouldn't that just be signally SD card activity?

I don't get an output to HDMI even after modifying the config.txt to include hdmi_force_hotplug=1 nothing changed.

I plugged in a standard USB keyboard a on boot tried pressing 1/2/3/4 to change the display mode and none-produce an output. Immediately after plugging in the USB my Display does reset it's NO DEVICE FOUND error and switch to a black screen before reverting back to NO DEVICE FOUND.

I re-formatted the card using SD Card formatter. Then re-imaged the SD card using Win32Disk Imager (from sourceforge). Now I get this pattern. Still confused.

The image I'm working off of is 2016-05-25-raspbian-jessie.zip, I've verfied my SHA1 sum with the download so I'm confident it isn't corrupt. I'm using a SAN Disk Ultra SD card (which is on the list of tested cards and is marked Green) so I believe my SD card is fine.

Valarauca
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  • What are you using for a power supply? – goobering Jul 28 '16 at 16:12
  • It does sound like it is booting successfully but the display is not working. Is this a new pi? What exactly is the HDMI jack connected to, an actual HDMI display or something else with an adapter? – goldilocks Jul 28 '16 at 16:17
  • Canakit ACDC converter. Model: DCAR-52A5 (Output 5V 2.5A) Came with this kit https://www.canakit.com/raspberry-pi-3-starter-kit.html – Valarauca Jul 28 '16 at 16:18
  • @goldilocks Male HDMI to Male DVI cable (manufacture is avantek) where it connects to a Dell E2216H monitor – Valarauca Jul 28 '16 at 16:19
  • That is the problem then. You need to try it with a an actual HDMI display -- although it may be a power issue, since those adapters I think draw more than the usual amount (you could try config_hdmi_boost=7, do not go higher than that), some people have just plain reported being unable to use them here before. – goldilocks Jul 28 '16 at 16:22
  • @goldilocks hdmi_boost=7 did not fix the issue. Going to hunt for a HDMI compatible motherboard. – Valarauca Jul 28 '16 at 16:29
  • The HDMI jacks on motherboards are generally outputs...don't do that unless you are sure it isn't or you may damage something. – goldilocks Jul 28 '16 at 16:32
  • I connected to a TV HDMI input via an HDMI/HDMI cable and it worked. So I'm going to revert the hdmi_boost=7 change. (assuming this works please make a comment about the HDMI-DVI cable being the issue I'll accept it as a solution) – Valarauca Jul 28 '16 at 16:37
  • @goldilocks I can confirm it works without hdmi_boost=7 – Valarauca Jul 28 '16 at 17:04
  • Actually whoops, I got the name of that option wrong -- see the answer I posted (I've corrected it in my initial comment here too for posterity). – goldilocks Jul 28 '16 at 17:13

2 Answers2

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Use of an HDMI -> DVI adapter cable is not guaranteed to work, although one thing you could try is:

hdmi_force_hotplug=1
config_hdmi_boost=7

Beware that although there are things scattered around the web about the fact that the latter can be set up to 11, 7 is the maximum recommended and I am positive someone here has reported rendering the HDMI output permanently defunct after jacking it up too high.

If that doesn't work, you may want to have a look at these Q&As:

Connecting Monitor via HDMI->DVI Cable does not work

Can't get Pi to work with a Sony SDM-S74 DVI-D monitor

Why my HDMI->DVI converter works only when powered from PC?

All of which have solutions of different kinds in particular contexts.

Community
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goldilocks
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You should use 2A-5V adapter or even 2.5A. Your Pi 3 requires sufficient current as it has a Wi-Fi and Bluetooth modules built-in the Pi board. These modules are current hungry if you don't support the Pi with enough current it will shutdown automatically as a kind of short-circuit protection.

Be aware not to increase the voltage as this will damage the Pi. Keep it 5V.

Tes3awy
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