Roomba Discovery 4210 was "played with" by 3 year old

Lift Roomba off the floor and place it in the center of the room and restart the clean cycle.

If Roomba did not resume cleaning, lift Roomba and turn it over.* Inspect the Side Wheels for dirt or obstructions.

Test the Side Wheels by pushing them in and out and making sure they rotate freely. Place Roomba in the center of the room and restart the clean cycle

.

Reboot is probably not your solution. Your Roomba will react to invisible signals or 'interference' from other electrical appliances as well as the invisible wall boxes. You can clearly see how this happens when a Roomba gets near your computer or other device that is on. Also, the Roomba will go in circles when the dirt chamber is full or it thinks it's full. Try a thorough clean of all major parts including the brushes. Sometimes this activity will occur when the brushes get snarled on thread or carpet fibers.

If your Roomba goes "uh-oh", beep-beep-beep, that's a 3-beep error code, indicating that your vacuum motor is stalled. Remove the grill from the outside (back) of the dustbin and make sure that the impeller (looks like a fan) turns easily and is not clogged with dirt. Then try to run the robot with the bin ON but the grill OFF. You should be able to tell whether the vacuum impeller is spinning. If not, you'll need a new bin. You can confirm wth customer support by calling 1-877-855-8593.

the battery on your roomba is dead, try charging it for 16 hours, after that if it still does not work. you need to replace the battery.

Do you have it set on "spot"? This causes Roomba to start out in circles, expanding and expanding until a certain time and then returns by going in circles, making smaller circles, until it gets to its starting point.

http://www.fixya.com/support/t766773-repairing_stuck_wheel_roomba_discovery

i just recently had someone bring in a roomba discovery and all it would do is stay in a tight 4 tile area and go in circles. battery was fully charged and all bumpers were clear.

i took a can of air blast for cleaning computers and blasted the area on the bottom underneath the sensor and watched as several dust bunnies came flying out.gave it a few more blasts for good measure and put it back on the floor and hit power then clean buttons.

thing went in same tight circle for 2 passes then the circle got bigger for 2 more passes , blue light indicator came on and it made a straight line dash across to closed door and started following the edge and criss-crossing the room.

called the owner back in to test and it repeated the same moves when she started it and all appeared to be working normal again.

Cleaned the shaft that the spinning brushes are connected to. Used an eyeglass screwdriver to remove the brush.

My status light came on, the vac beeped twice and stopped. I noticed my brushes weren't spinning. I took an eyeglass screwdriver and took off the center screw that holds on the brushes. I cleaned the shaft that the brushes spin on. replaced brushes and it works great! I just did this now and it is still running. my status light problem is fixed my roomba is 4 years old and I am on my 2nd battery. Seems to have fixed the problem. FYI it was wrapped with hair, dirt and it was greasy.

I had the same kind of problem with my model 400 today...after starting it and having it go in a circle for 30 seconds or so it would finally run into something and then back up a few inches, turn, then go forward a few inches, then back up a few inches, turn, then go forward a few inches, etc., etc.. I tried cleaning off the four pairs of sensors under the bumper and blowing out various things underneath (by mouth since I didn't have any canned compressed air). It didn't really help. It then occurred to me that I had a leaf blower! I put the Roomba upside down on the grass, put the leaf blower on high, and blew at it from all directions and up close. More dust came out than I thought would. It has been running normally now for the last 45 minutes.