Hi, it might be the 9-beep error. You can compare it with the video found on the EESolutions.ca website. They sell a repair kit there that can help you fix your Roomba.
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It is possible for the charging system inside the roomba to call it quits. What I did to remedy this, since my roomba was out of warranty and I did not want to scrap it, was to buy a charging base on ebay. This charging base accepts different types of roomba batteries and even the scooba battery. The inconvenience is if you have a newer model roomba that has the battery inside, then you will need to remove the screws on the bottom plate to remove the battery. Hope this helps.
Rather than try to repair it or look into it, call the dealer or take it back to him as you will invalidate your warranty if you do anything to the unit, and that is not worth it. Let the dealer worry about it.
Check the connector on your ROOMBA, there is a switch that open the ground when you connect the charger direct to the ROOMBA and a lot of times it get stock and remain open. Using a small screwdriver press the metal plates to force to close.
Something is blocking the battery current and preventing the Roomba from running.
Low voltage contacts can be blocked by thin films formed by condensible organic outgassing in the home environmental (That's the yellowy haze that slowly builds up on the wall paint.)
Try cleaning the battery contacts with a little rubbing alcohol or contact cleaner on a foam swab, or a bit of paper towel. Take a litle time, it doesn't always dissolve instantly. (Don't use a pink pencil eraser, it would scrub off the plating that prevents corrosion) Clean both contacts on the battery pack and both of the contacts in the Roomba. Make sure the battery is oriented correctly when you put it back in.
If that doesn't help, the battery itself can be defective such that it has a very high internal resistance and can only charge and discharge very slowly. It can be fully charged, and unable to deliver that charge at a pace that allows the Roomba to operate. Sometimes its possible to rehabilitate such a battery by conditioning it over several charge and discharge cycles, and sometimes its ineffective. Since thr Roomba won't run you'd have to use a something like a 20 to 50 ohm power resistor to drain the pack to 10v before charging it.
Of course as your description suggests, its also possible the processor has a fault and you need to buy a new one.
Try to clean the metal contacts in the dock and in the roomba.
If you have a multimeter, measure the DC voltage on the dock contacts. If it's around zero volts, then you have a faulty dock.
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.
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.
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