Any thoughts on this? I'm helping fix the in-laws (!) Roomba 530. We start it from a green Clean button on the dock and it gets between 3 and 10 centimeters before giving up.
When it gives up it sits there with the clean button flashing green (all others off), it plays what sounds like a happy tune (6ish notes, all rising), and then briefly tries to start again (the motors/fans whir for a split second). It then repeats until you either turn it over or sometimes after a while it goes silent and flashes a red clean button. If you drop it back on the dock it just starts again (no need to press a button, off it goes) until it gets off the dock and the above repeats.
I assumed this was a bad battery and stuck in a spare I had - but it's exactly the same. Perhaps gets a few more centimeters with the new battery, even turned around once, but that's it.
Could I have two bad batteries (the "spare" has been sat on my shelf for a year or two since I bought it to fix my Roomba and it turned out to be needed)?
Or does this sound more terminal?
I've checked everything else, sensors look clean, wheels are free of debri and turn freely, etc.
Please, help me win favour with the in-laws!