Infotainment/Head Unit Flashing Green/Blue Sceen

1. Hold the power button for 30 seconds and try to force the unit to hard reboot. This didn't work for me (I tried several times for up to 60 seconds; it would just flash green as soon as I took my finger off the power button).
2. Hold the power button and brightness button simultaneously for 30 seconds, as this is supposed to be some kind of special hard reboot combination. It didn't work, but interestingly every time I tried this specific combo, the unit would flash a blue screen instead of green.
3. If none of the above work, they said the unit was supposedly bricked. Take the car to a Honda dealer and have the head unit replaced. This is what many people resorted to in my research. My car isn't under any kind of warranty, so I wasn't about to go that route because it would probably be pretty expensive and time consuming.

1. Pop the hood. You should see a a rectangular plastic box on the right side (10th gen Civic). That's the fuse box. Open it.
2. Inside of the lid you just removed, there's a white plastic clip/tongs looking thing mounted in there. Take it out. There's also a diagram of the fuses which might look a little confusing.
3. I think fuse #18 is "radio" and #19 is "backup". They are normal small 1-slot fuses in the right side column directly underneath the larger fuses that take up 2-4 slots of space.
4. Use the tool from step 2 above to remove both of them, and leave them out for about 30 seconds.
5. Replace #18 and then #19. Make sure they are all the way in. It's hard to get them back in with the tool, since it's more of a fuse puller tool, so you may have to carefully get them started with your fingers and then turn the tool vertically to push them down in.

Scathe said:

I was actually able to resolve this issue on my own, so I'm not posting this to get advice, but to help others if they experience this issue.

Bought my Civic EX-T preowned, and was having trouble pairing it with my phone. I tried a ton of things to get it to work, and it just wasn't seeing my Galaxy S9+ at all. So I did a hard reboot on the head unit, and that didn't help at all. I decided to try a factory reset instead, and after clicking "ok" through all the warnings about settings and everything being lost, the unit never booted back up. It just kept flashing a green screen; no audio, no bootup screen, it was unresponsive to holding down the power button, etc. Every time I did anything, it would flash solid green 3 times and then go black. I tried starting the car, turning the car off and restarting, same result. For whatever reason it didn't seem to be able to recover from the factory reset.

After Googling the issue, I found 3 suggestions:

1. Hold the power button for 30 seconds and try to force the unit to hard reboot. This didn't work for me (I tried several times for up to 60 seconds; it would just flash green as soon as I took my finger off the power button).
2. Hold the power button and brightness button simultaneously for 30 seconds, as this is supposed to be some kind of special hard reboot combination. It didn't work, but interestingly every time I tried this specific combo, the unit would flash a blue screen instead of green.
3. If none of the above work, they said the unit was supposedly bricked. Take the car to a Honda dealer and have the head unit replaced. This is what many people resorted to in my research. My car isn't under any kind of warranty, so I wasn't about to go that route because it would probably be pretty expensive and time consuming.

Here's what I ended up doing to fix it:

1. Pop the hood. You should see a a rectangular plastic box on the right side (10th gen Civic). That's the fuse box. Open it.
2. Inside of the lid you just removed, there's a white plastic clip/tongs looking thing mounted in there. Take it out. There's also a diagram of the fuses which might look a little confusing.
3. I think fuse #18 is "radio" and #19 is "backup". They are normal small 1-slot fuses in the right side column directly underneath the larger fuses that take up 2-4 slots of space.
4. Use the tool from step 2 above to remove both of them, and leave them out for about 30 seconds.
5. Replace #18 and then #19. Make sure they are all the way in. It's hard to get them back in with the tool, since it's more of a fuse puller tool, so you may have to carefully get them started with your fingers and then turn the tool vertically to push them down in.

After doing that, my infotainment system came right back on immediately, and I was able to pair my phone with it just fine this time! Unit was not bricked, and no trip to the dealership needed!

Click to expand...

Scathe said:

I was actually able to resolve this issue on my own, so I'm not posting this to get advice, but to help others if they experience this issue.

Bought my Civic EX-T preowned, and was having trouble pairing it with my phone. I tried a ton of things to get it to work, and it just wasn't seeing my Galaxy S9+ at all. So I did a hard reboot on the head unit, and that didn't help at all. I decided to try a factory reset instead, and after clicking "ok" through all the warnings about settings and everything being lost, the unit never booted back up. It just kept flashing a green screen; no audio, no bootup screen, it was unresponsive to holding down the power button, etc. Every time I did anything, it would flash solid green 3 times and then go black. I tried starting the car, turning the car off and restarting, same result. For whatever reason it didn't seem to be able to recover from the factory reset.

After Googling the issue, I found 3 suggestions:

1. Hold the power button for 30 seconds and try to force the unit to hard reboot. This didn't work for me (I tried several times for up to 60 seconds; it would just flash green as soon as I took my finger off the power button).
2. Hold the power button and brightness button simultaneously for 30 seconds, as this is supposed to be some kind of special hard reboot combination. It didn't work, but interestingly every time I tried this specific combo, the unit would flash a blue screen instead of green.
3. If none of the above work, they said the unit was supposedly bricked. Take the car to a Honda dealer and have the head unit replaced. This is what many people resorted to in my research. My car isn't under any kind of warranty, so I wasn't about to go that route because it would probably be pretty expensive and time consuming.

Here's what I ended up doing to fix it:

1. Pop the hood. You should see a a rectangular plastic box on the right side (10th gen Civic). That's the fuse box. Open it.
2. Inside of the lid you just removed, there's a white plastic clip/tongs looking thing mounted in there. Take it out. There's also a diagram of the fuses which might look a little confusing.
3. I think fuse #18 is "radio" and #19 is "backup". They are normal small 1-slot fuses in the right side column directly underneath the larger fuses that take up 2-4 slots of space.
4. Use the tool from step 2 above to remove both of them, and leave them out for about 30 seconds.
5. Replace #18 and then #19. Make sure they are all the way in. It's hard to get them back in with the tool, since it's more of a fuse puller tool, so you may have to carefully get them started with your fingers and then turn the tool vertically to push them down in.

After doing that, my infotainment system came right back on immediately, and I was able to pair my phone with it just fine this time! Unit was not bricked, and no trip to the dealership needed!

Click to expand...