 Welcome to BCH Technologies. This is Kevin. Today we troubleshoot a black cartridge for our customer. Let's talk about the light first. Canon doesn't know how much ink is in your cartridge at all. However, Canon has a counter on your cartridge's chip. So you know how many pages a cartridge has printed. So basically, when Canon thinks you have 20% of cartridge left, you're going to see this brown light going to light up for the color cartridge. Nothing to worry about it. It just shows you it thinks it's low on ink. So now you can see the black is blinking. Why is black blinking? That is because you turned off the ink monitor. And Canon doesn't track the black ink level anymore. So it doesn't count how many pages you printed with black. And it will always blinking. There's nothing you can do to make it unblink. And when Canon stops tracking the ink, you can print forever as long as you actually have ink in the cartridge. This is different than when you have something on the electronic ribbon, or maybe you have ink stand that caused some electronic problem with a printer. And that kind of blinking is different than the blinking you saw. So we pretend that we have some electronic problem with the cartridge by putting a piece of masking tape on the electronic ribbon. Now you can see this is actually the air. You can see the hazard light is blinking. I also asked how can we turn off the ink monitor so make it more like a black. You have to light this light up. Actually, you cannot do it as low. You cannot do until the printer thinks you are out of ink. So the color cartridge, you just need to keep printing, keep using the color cartridge. So if we go to print, you can see the color cartridge have a yellow exclamation mark on the top. That means it's low on ink. And the black cartridge, if you notice it, the black cartridge is totally blank. That means the ink monitor has been turned off. So there's no other way other than just print and print and print until one day you're going to see a pop-up window when you print a color. And here's the air. That is a support code 1688 or 1686 for the black, if it's black. And you can see the monitor, the color has a red cross on it. Don't close those two windows. Just go to your printer and find the stop key. And hold down that key until the window goes away. And I'll hold down the key right now. And you can count how long the window disappear. There we go. Now you can print forever. And you can see the color monitor is turned off. So the customer sent this in. And he sent it without the refill plug. I don't know if he lost it or for some reason. So I just randomly grabbed a blue plug plugged in. And so basically when you print, you have to have this plugged in. And if you see here, here's a hole. That's the air hole. And do not ever block that air hole. So the symptom for this customer is he, I think his black is clogged. He refilled it and put it in and he printed stripes. So let me just do one thing that probably going to fix both of them. First thing I'm worrying is whether he sealed the parameter correctly. So I'm going to blow some air into this air hole. And that will increase the pressure here. And if he sealed this correctly, the ink will coming out from the bottom. And there's no air bubbles coming from the top. And when I'm doing that checking and also what it does is I push the ink out and therefore unclog the bottom. After I do that, I'm going to remove the plug and release the excess pressure. You can blow on the top and sink the end and see if there you have bubbles or you can just put it under water and blow the air in. So you can see it was sealed tightly and you push some ink out. That's good. So now I'm going to release the pressure. Be careful that most of the time you're going to have an explosion. And rinse a little bit. And have a paper towel or something to dry it. And it's ready to put in for a checking. Since we only work on the black cartridge, let me show you a trick. Here you can go about ink cartridge settings. And you can let it only use the black color or the color cartridge or the color cartridge. It's OK. However, there's a glitch here. So for example, even we have a black and white picture. And with that print, I don't want that big, I'll do a smaller one. And that's a print. And you're going to see a says it's going to use the color cartridge. Although I turned it to black to only use the black cartridge. So the reason is Ken automatically selected a photo print for you. So you go instead of that, we go print. Let me show you three things. One is we use a plan paper. Plane. Not a glossy for a glossy paper. And then we go to options. And then we go to printer properties. And make sure we turn the gray scale on and the borderless printing off. Not if I will click print. Booyah black cartridge. That's the cartridge that hard working Americans use. I hope you enjoyed this video. Cheers.