Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
That is so rare a problem, that I cannot imagine what caused it.
I refer specifically to the belt 'flipping over'. It must have been either
A. defective to an unusual degree, and/or
B. much too loose.
By now it is almost certainly defective. But aside from that the stress of 'flipping over' and blowing the circuit breaker, may have damaged more than one component in the treadmill, I'm sorry to say. That's just the sound of it.
However: are you sure you have adjusted the belt back in place, with the right tightness setting? it was obviously wrong before, but is it obviously right, now?
Also, does the belt show signs of damage? (probably. But if so, to what extent?)
OK. Let me know when you are back, please.
Also: Is there any error code when you get the 4-times-flashing light? showing anywhere on the console.
You may ignore the phone call request solicitation - it came from the system not from me, thanks.
The error code on the condole would be spelled out by alphanumeric or LCD displays. It should be obvious - if there is one there at all.
All right then: Try to produce the error condition - e.g. by trying to turn the treadmill motor on in the normal course of usage. I.e. try to start the belt running (you don't have to be on the machine, you just have to have the safety key properly inserted in place.)
Does anything, no matter how much it may look like gibberish, show on the console in that case?
Try making sure the belt is adjusted properly.
The solution that you should try first, is that the belt might need readjusting and lubrication (with the special, non-grease, lubricant these treadmill belts generally require.)
The belt should be adjusted, generally speaking, so that it is loose enough that it does not quite slip, but nearly that loose.
If the belt is adjusted (or, has shrunk up with age, and lack of lubricant...) too tightly, then it can stop the treadmill from working or running. An over-tight treadmill belt can cause wear, or even damage, in many other ways, such as by overheating the motor.
In this case, I must apologize - I have little experience with Reebok brand treadmills, and I'm not sure what the flashing light means.
Having the belt do what it did, probably damaged some component of the treadmill, I'm sorry to say.
It might be the motor, the motor controller board, or doubtfully a part of the power supply.
Since another Expert might have more to offer, and to give you chance at that information, I have Opted Out of this case (but can still respond.)