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Problem with ST16S

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I have a problem with the ST16S - it's the instrument cluster from the H520E drone and the issue is that in order to switch it off I unfortunately have to remove the battery because the switch doesn't always respond to switch off but when I release the battery with the button on the back it switches off. I have taken the camera apart but I can't see anything different to the others. What could be the reason for this (I have not had this happen yet). Thank you in advance for any hints.
 
I have a problem with the ST16S - it's the instrument cluster from the H520E drone and the issue is that in order to switch it off I unfortunately have to remove the battery because the switch doesn't always respond to switch off but when I release the battery with the button on the back it switches off. I have taken the camera apart but I can't see anything different to the others. What could be the reason for this (I have not had this happen yet). Thank you in advance for any hints.
You mentioned the drone, the ST16S, and the camera. Please clarify which has a problem.
You mentioned a problem with not turning off, but you also seem to mention some other problem "has not happened yet". What is the second problem?

You also stated ST16S and H520E, which are not compatible.
The ST16S is compatible with the H520.
The ST16E is compatible with the H520E,
Did you mean ST16E?
Or possibly you meant H520 without the "E"?
 
The problems are a couple and involve 2 ST16S instruments so I will describe in points:
1. the one described earlier is OK as far as the software is concerned only physically when switched to the right it just keeps on going or shuts off, however the issue is with the rear switch where you remove the battery. If I start to move it, i.e. press it, then the instrument cluster switches off. The question is whether I need to replace it or if there is another way to repair it.
 

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......the issue is with the rear switch where you remove the battery. If I start to move it, i.e. press it, then the instrument cluster switches off. The question is whether I need to replace it or if there is another way to repair it.
"the one described earlier is OK as far as the software is concerned"
The pictures you posted show DataPilot 2.0 is installed. DataPilot 2.0 was intended for the ST16E. It will install on an ST16S, but will likely have conflicts. You have repeatedly stated you have an ST16S. Are you certain both controllers associated with H520E drones are actually ST16E instead of ST16S as you stated above?

"the rear switch where you remove the battery."
The button is just a mechanical latch. If it is behaving like a switch, the first thought is a possible problem with the battery. A quick check would be to swap batteries between the controllers to see if the issue follows the battery to the new controller.
 
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Thanks for the clarification, below is a photo of the controller described (is it an ST16S? - I saw a comparison somewhere on the forum but can't find it :(). After checking 2 controllers and 3 batteries on the problematic controller at 2 batteries the ST16 automatically turns on (even when the switch is in the off position) while at 1 it works normally (it is discharged but I will recharge it and check again tomorrow to be sure.
On the other controller, the battery that is in it, after attaching it to the problematic one, behaves in the same way, i.e. it turns on the station despite the switch position in the off position and, after turning it on, I cannot turn off the station but have to remove this battery.
To sum up, I don't understand what is going on with these batteries, if you can explain I would appreciate it
 

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Thanks for the clarification, below is a photo of the controller described (is it an ST16S? - I saw a comparison somewhere on the forum but can't find it :(). After checking 2 controllers and 3 batteries on the problematic controller at 2 batteries the ST16 automatically turns on (even when the switch is in the off position) while at 1 it works normally (it is discharged but I will recharge it and check again tomorrow to be sure.
On the other controller, the battery that is in it, after attaching it to the problematic one, behaves in the same way, i.e. it turns on the station despite the switch position in the off position and, after turning it on, I cannot turn off the station but have to remove this battery.
To sum up, I don't understand what is going on with these batteries, if you can explain I would appreciate it
"is it an ST16S?"
It would be better if someone with H520E experience answered. However;
I think they look exactly the same on the outside. The main difference is the OFDM control protocol of the H520E system. If your controller will bind correctly to an H520E drone, then it is a good bet it is an ST16E controller. Also, I think this image shows the internal hardware difference:
ST16S vrs ST16E  internal view.jpg

"the ST16 automatically turns on (even when the switch is in the off position)"
It sounds like you have eliminated the batteries as a possible cause. The next step would be a factory reset of the controller, re-installation of the APK and check again. If still a problem, the step after will be to remove the back of the controller and start looking for damaged wires or bad connections.
Does the ON-OFF switch itself feel normal when compared to the switch on the working controller?
 
But unfortunately there is still a problem and I don't know where to start. On 1 battery I switch it off but when it is charging it just automatically switches on (it shouldn't) and I can't switch it off with the switch but I have to remove the battery but when I press the battery button it switches off when pressed but when I release it of course it switches on again so I don't really know where to start once I've dismantled the controller.
 
But unfortunately there is still a problem and I don't know where to start. On 1 battery I switch it off but when it is charging it just automatically switches on (it shouldn't) and I can't switch it off with the switch but I have to remove the battery but when I press the battery button it switches off when pressed but when I release it of course it switches on again so I don't really know where to start once I've dismantled the controller.
Maybe at least start with a check of the battery contacts and solder joints area. Seems reasonable since the on/off change has some relation to pressing the latch that is in the same area.
This may ultimately become a task of changing components between the problem controller and a known good controller until the problem goes away (or follows a component over to the good controller). @DoomMeister once called this technique "Swaptronics". It's my favorite way of finding things that hide from me.
I would bet other languages have a similar word for this same technique.
 
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