I'm not sue what we can do to help.

The middle image, with the vertical stripes and stars in the brighter ones, seems to indicate that the problem is the connection between the controller and the CCD, IMO probably the reading of the data from the CCD rather than the control signals used to clock the data out. That could be the white ribbon cable, the preamplifier or the ADC chip on the board.

I'm going to take the camera back with me, and get Atik to change the board. The cost of it isn't that high, I cannot remember exactly how much but it's affordable.

Looks like that camera is a lemon.

Is it still under warranty? They should really send you a new one.

It's no longer under warranty, but that's not a problem. I'll get a new board

Possibly more a historic artefact

The middle image (Light_070.fits, vertical stripes) makes me think that there could be some interference from either a faulty or leaky part of equipment (switching power supply or PWM dew heaters maybe) into the camera signal. From the ATIK 314L camera specs and what I can see, "Horizontal drive frequency: 28.64 MHz", "Total number of pixels: 1434 (H)..." and 5 cycles of 'interference' horizontally, the interference pattern would have a frequency of roughly 100KHz. If you know of or can find the source of such signal that may lead you to a solution (replace/repair faulty part).

As far as the blank images (Light_075.fits), I can't help much as they don't fit in my interference hypothesis.

Hope any of this helps.

Have you tried testing the camera by adding one thing at a time from your kit? You said it worked with the laptop and observatory computer. What happens when the mount is connected, does tracking influence it? Does it conflict only with the guide camera connected? Powered hubs? Dome control system? Any one of these could come down to power load, power noise, or driver issues. Can you power the camera from an independent power source?

Oops! From the info below the Lights_070,fits image, I understand that the image is zoomed-in. My estimate of the interference frequency will be off then. If only 46% is seen that means that the interference would be closer to 200KHz. I would be surprised that dew heaters and switching power supplies go that high.

That middle image isn't something I've had before, it's new to me. I can't explain it, I cannot replicate it as the camera produces nothing now.

The camera worked fine the other day indilib.org/forum/general/6181-frustration.html?start=24#49527
This is the only power supply I have here, I'll see what I can do by switching off what I can.

Can you describe how your power system is layed out? It could all just be due to a cheap AC inverter.

Great advice, standard trouble-shooting MO. The simplest setup would be to connect the camera directly to your computer(s), then add everything else one by one. If I am not mistaken, the camera won't have to be connected to 12V to operate the sensor, the 12V power is only required to operate the cooler. So with a little bit of luck () that may already make the stripes appear. Odds are that the problem lies within the circuitry of the camera itself, rather than outside.
Next, I would probably bridge the AC power source with a capacitor. There may be noise in the power line at your observatory. Unprotected LED lights are a prime source of that noise. I found that out when I installed LED lights in a couple of closets at home and my ethernet over powerline adapters went silent. Bridging the power supply to the LEDs with 5µF capacitors fixed the problem. That is easy to test, just switch off all the LED lighting then and see whether the patter disappears.
Either way, welcome to the world of troubleshooting misbehaving modern electronics! So much fun. Who needs astrophotography anyway? Way overrated!!!