After a few sessions with the Meade ETX-125 it was time to also try the larger telescope, the Obsession F/4 18" telescope. The first tests in house during daytime showed that everything still worked. Only the mirror is quite dirty. It should be cleaned but that can wait. For observations is a dirty mirror most often not really a problem unless it is really really dirty. So for the first test I don't do anything about the condition of the mirror.
One of the problems I found was that the control computer, the Argo Navis, had lost the battery power. After buying a new battery, opening the controller and replacing the empty battery I had to set the date and time again. All other settings are in non-volatile memory so these were kept even with an empty battery. The motor drives worked good and also the motor controller, the Servocat.
Also the Telrad, the device that is used to visually point the telescope to the object in the sky, seemed not to work. After changing the batteries it still didn't work, but after checking again when it was darker, I saw the red rings. So apparently the device works but the rings are too faint to see them during the day.
Another problem, that I had found some time ago, is that the laser collimator was defective. I tried to repair it but without result, so I ordered a new one.