Question simtools motion error when connect monitor to hdmi or dp port

I install simtools both version 2 and 3 with my notebook, and I can use it and motion worked normally for a year. But last month it just had problem. When i connected the monitor to hdmi port, motion had unusual movement immediately. When i unplug cable from hdmi port, it's back to work normally again. when i connect steering wheel to usb, it also had error.

I searched in this forum to find out how to solve the problem. I tried to close antivirus and firewall, delete simhub, reinstall software it's still error. And finally i found out that it occurred from fanatec driver of my new steering wheel. When i uninstalled it, motion worked normally again.

But last week, this problem occurred again. But now I don't know how to solve it and need all of you guy help. I try many ways. try to delete some software, reinstall simtools software, try to change to my other new pc, install both version 2 and 3. It also has same problem. I also try to install with my other notebook with reinstall windows, it also has same problem. I find that the error will occur when i just bring hdmi cable to touch hdmi port.

you may have some electrical interference

what type of sim and wheel do you have ?

- 4 axis of chinese actuators, i don't know how to call. I have 2 sets of them. when i test, they have same problem. Last month, it still work normally.
- I have thrustmaster t300 rs gt edition, logitech g29, fanatec dd pro, etc.

yes i also try to change new usb cables with usb2.0 and 3.0. it's still error

Yes, I had moved location to my new extension room on oct. That time it also had an error and I solved by changing usb extension cable. Now it's still in the same room. But i will recheck by testing with other room as you mentioned.

After checking, it's not caused from the wall plugin. Do all of you have any recommend to solve this issue? need all of you help please.

When testing, i connect only this sim motion actuator to usb for testing. nothing connect to my notebook.
I have 2 set of sim motion actuators, all both can use last month.
1st notebook - window 11, simtool 2 & 3, steam, xbox pc game pass, logitech driver, thrustmaster t300, th8a, tss handbrake driver, it's all the same condition like last month that I still can use.
2nd notebook - I just reinstall with win 10 and install only simtools app for testing. but it's same error.
3rd pc - just build up install window 11, triple monitors with dp port, simtools 2 & 3, steam, xbox pc game pass, ea app, and dbox software use with fanatec dd pro. I test simtools with chinese sim motion, it's the same error. dbox can use normally.

Many thanks to all of you to confirm me, finally i recheck all again and again. I just know that the problem came from only my universal adapter of my machine that was no grounded. that's my very stupid. Now it can work normally.

But i just have new issue about my another machine, it's just not working suddenly, nothing happen when i press turn on output testing. this afternoon i still tested and it's still working.

I just used the same notebook (1st one) to test with these 2 machines. no any error message or error sound. just nothing motion happen from the actuators. I don't know why, I do all the samething like before.

I just found that one connector inside the machine is loose. (small green one) Now it works well again.
Thank you all of you.

I am very surprised with all of you that can investigate from only my typing. I really appreciate and thank you for all of your time to help me.