So I bought a Raspberry Pi 2 to run SpillPass. It initially showed me a screen when plugged in via HDMI. Now the TV says no signal. According to the program cycling MAC addresses the device is cycling the MACs properly and the WiFi dongle is flashing properly. I am not sure whats wrong or what I should do. I only followed the SpillPass instructions and didn't install anything else. I don't want to unplug it because it might get damaged. The only reason this is an issue is I cannot shut the device down properly.

Here is a link to the instructions I followed to get it up and running. Any help would be greatly appreciated.


3 Answers 3


most of the question is redundant - what you are running is irrelevant

your tv says "no signal", so it's not getting anything from the raspberry pi -

  • check/replace your HDMI cable
  • check on another TV

If the problem persists, then it may even be a dead pi hdmi circuit

  • It could easily be a screen saver/blanker - with no actual fault! 8-)
    – SlySven
    Jan 6, 2016 at 21:56

Overly-simplified beginner-friendly SSH tutorial/crash course (Windows):

What is SSH?

  • SSH, or Secure SHell, is a way to use the command-line interface over the network.

Wait. What's a command line?

  • A command-line interface is a way to tell a computer what to do. The difference is instead of the usual point-your-cursor-then-click (called a GUI), you type in the commands instead.

Okay, got it. Now how do I connect to the machine via SSH?

  • For Windows, you should go get putty(direct link)
  • For Linux or OSX, you don't have to download anything. They can already use SSH.

Looks scary. How do I use this?

  • I'll be straightforward here. If you are a complete beginner, simply enter the IP address and click Open

enter image description here

It's asking for login details. Help

  • Unfortunately, I have no idea what username/password you should use for SpillPass. Try using pi as the username and raspberry as the password.
  • While you're typing your password, you shouldn't see anything happening (no asterisk***, nothing). This is perfectly normal.

Ooh. I see a terminal. Wait. Is this it?

  • If you can see pi@[IP address or something] ~ $, then congratulations. You're looking at a terminal (another term for command-line interface).
  • Try typing apt-get moo and then press enter. If you see something, congratulations. Your Pi is not broken.

Additional points

Can I turn off my Pi? OMG, it might get broken.

  • It won't break*

Why did my screen go blank? What's happening?!

  • It might be saving power. Sort of like when your computer monitor turns off after a while.
  • Try attaching a mouse or keyboard then press something. The monitor or TV should be back on again.
  • It have been much better if you had written a self-answered Q&A about using SSH from windows and placed a link in a comment. Since the OP isn't using default Raspbian, there's no reason to believe sshd is even running, which would mean this answer has nothing to do with the question...
    – goldilocks
    Jan 6, 2016 at 14:00
  • 1
    However, there is a brief reference to using putty and ssh here, so presumably it is running. :)
    – goldilocks
    Jan 6, 2016 at 14:03

Secure SHell is, for most user, a way to access a shell ("command line interface" or CLI in some circles) on a machine across a Local or Wide Area Network. As such, provided you have a resolvable name (a name that can be resolved into an Internet Protocol Address) or the IP address directly AND the access credentials (in simple cases often just the user-name and password) you can use the remote host as if you were typing at a keyboard and screen on it when that screen and keyboard is actually the ones on the local host you are sat at.

If you have a *nix (Linux, Free/OpenBSD, Solaris, MacOS X) PC all you need to run is something like ssh [email protected] however the complication is that you may not know that IS the address (it probably ISN'T) for you to use. To obtain that, one way is to run the nmap (network map) command with arguments to search your Local Area Network, and filter the results to get the one that matches the range of MAC (Hardware address) assigned to the Wired Ethernet Port on the RPi. One way is using the awk command:

sudo nmap -sP | awk '/^Nmap/{ip=$NF}/B8:27:EB/{print ip}'
on your PC - I don't have a Pi up and running now but the output should be obvious.

As of Windows 10 Microsoft has not got a native equivalent to SSH (As Far As I Know!) but there is a well known Free and Open Source solution in the form of Putty("It makes windows usable!") which when run in a Windows GUI, will create the equivalent to a text screen on the remote host. You will still have the issue of finding the IP address to use (though you may get somewhere with raspberry.local if Zeroconf/Bonjour is in use on the PC and the RPi.)

Assuming that you can get a SSH link running to the RPi for the first time you may get a warning that the remote machine's (the RPi) finger print is not recognised/known - this is to be expected - you will need to respond with yes to proceed - then you will be presented with a username then password prompts - unless you have changed them the defaults of pi and raspberry will be what you need to get in so that you can issue the shutdown -h -P now command before waiting say 45 seconds to allow everything to finish before removing the power...

  • Well typing in the IP address in my browser brings me to an interface that lets me change macs and such for the device. However it does not let me type any commands for the device. The only way I can type commands is via the tv, I might be able to do something via the SD card but I have no idea if removing it will cause issues sense it is running a process
    – Anthony
    Jan 6, 2016 at 4:33
  • @SlySven See my comment on PandaLion98's answer.
    – goldilocks
    Jan 6, 2016 at 14:01
  • Don't remove the card whilst the Pi is powered up! - You risk corrupting any files that are open and given that usually there are files that are open all the time (though there are distributions / workarounds that minimise or eliminate that) in normal cases this is likely to cause problems afterwards.
    – SlySven
    Jan 6, 2016 at 22:35

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