![]() ![]() the board seems to boot normally, but no video. The Raspberry pi, Powers up, The green ACT led flashes for 20-30 seconds Before it "quiets down", No signal from my monitor, No signal if connected to the TV (The KNCMiner does output to that TV so there should be no incompatibility issues) The powerbrick has been changed between different ones, Modified D-Link powerbricks 5V 2A, the latest one i found was a huge thing, 5V 3A, but the result is the same. I just cannot make it output anything on HDMI, the microsd card has been swapped and tested on a kncminer that runs a similar raspberry pi, if not in fact identical. So after my initial purchase of the Raspberry Pi Model B (The biggest model, quad core and 1gb ram) Or you could have just read the R-Pi Troubleshooting Guide like I did when fixing the same HDMI problem in just a couple of minutes: However it might simply be that the display requires a stronger signal than the Pi can give. If you see a problem with the red colour - either absent, or interference - then try a boost. Make sure your Pi's power supply delivers 1A and not 500mA. Using a shorter or better quality HDMI cable might help. If the display is a computer monitor, use hdmi_group=1 and if it is an older TV, try hdmi_group=2.ĭo not set hdmi_safe=1 as that overrides many of the previous options. You might also need to set config_hdmi_boost=4 or even higher (up to 9) if your display needs a stronger signal. Setting the hdmi_force_hotplug=1 makes sure the Pi believes the monitor/TV is really there. Some devices may not immediately notice the Pi's HDMI or may not do the negotiation. ![]() The Pi outputs a relatively weak HDMI signal. If upgrading your monitor is out of your budget, you can learn how to build your own monitor if that path interests you.Sshipway wrote:I've investigated a problem similar to this one for a couple of weeks now. If you find yourself in the situation of needing to upgrade your monitor, check out some quality models with new advanced features, like the best monitors for eye strain. ![]() A faulty or out-of-date graphics card driver can cause a no-signal message to appear on a connected external monitor. Update Your Graphics Card DriversĪlternatively, you may need to update your graphics card driver. Never remove the cover of a PC while the device is powered on. A bad video card or incompatible video card driver may cause a display device to show an error message, even if you have the best ultra wide gaming monitor on the market. Make sure you disconnect all cables and confirm that the device is powered off before removing an internal graphics card. If you’re using an interchangeable graphics card, make sure the graphics card is firmly inserted in its slot.
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