Just as I post that my pump is working again, it got stuck again when it is set to W1/S3 ! lol.
So I have to run the controller at max speed just to get some flow out of the pump. But then when it shifts back to normal it causes a storm in my tank
I am taking it off-line for now just to be on the safe side.
I ordered the power supply that you linked and will see how that works.
Also, I contacted the eBay seller and told them what was happening to my pump and explained what steps I already did to troubleshoot.
They are sending me a replacement pump to help isolate the problem since it has a 12-month warranty.