When connecting to fire stick, green and red vertical lines are shown and connection is not there? What caused this? Is the fire stick no longer working?

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

If this projector is connected by Component Video (3 or 5 wires) instead of HDMI, the most common color related problems are caused by having one of the 3 video cables (Red, Blue or Green) with a bad connector. If everyone is a green smurf the problem is with the red cable. If everyone is a red smurf the problem is the blue cable. If the green was bad you wouldn't see anything.
Another possibility is if the green is plugged into the yellow jack instead of green jack on the projector, you could see what you are describing.
If everything checks out, take the projector to a repair facility.
If you are connected by an HDMI cable, (combined with the fact you mentioned vertical lines not horizontal) then take the projector to a repair facility.
All of this assumes that you don't just have a bad Cable Box or Blu-ray player or Home Theater Receiver. (The source)

If any colors (red, green, or blue) are missing, check the video cable to make sure it is securely connected. Loose or broken pins in the cable connector could cause an improper connection.
Connect the LCD display to another computer.

hi this may be a bad tab/ribbon fault which is connected to the screen, there is little test you can do when the lines appear you get some freeze spray, spray the area where the line are if they disappear then you have a have , bad tab, you can repair this temporarily by bonding the tab with rubber and tape to stop it flexing which could ,make the tv last a bit longer, but no means is this a repermanent repair hope it helps

regards
shaun

The video processor no longer operates - the lines are caused by the simple operation of the timer clock of the processor. The card is dead and you must replace it.

Very common problem usually caused by a defective B Block.

A vertical line means the line is up and down in the middle of the screen. That would indicate that the vertical IC and the surrounding components are working perfectly. A vertical line as described is the result of a lack of horizontal deflection (to move the beam from side to side) Since the high voltage is obviously OK, the problem is most likely a bad solder connection in the horizontal yoke circuit. Examine the bottom of the PC board in the area of the flyback transformer, and yoke connector (has four wires Red, Blue, Green, Yellow).and the pincousion coils, capacitors, etc in between. Flexing the board in that area may cause the problem to come and go. Resulting arcing should also be visible. BE CAREFUL, as hazardous voltages are present in the circuit!

Most likly the signal connector is loose or dirty. (input) this would cause the red, gree, blue or a combination to not be connected.

sounds like your graphic card is bad, try first to download updated drivers from the internet and see what happens, also try to connect an external monitor and see what happens.

Sounds like the green is out of focus. If the focus control for the green does not control it enough to make the width the same as the red, then, the lens on top of the green can be adjusted to focus that tube. On the lens, there is a wing nut on a screw to loosen it and move the lens left or right a bit to help with the focus. Hope this helps.