I have had a TSU-7500 since about 2006, and it has shown no signs of any problems in all that time. About maybe three years ago, I replaced the original battery with a replacement battery, and that battery seemed to work fine.
Now, I have a constant low battery indicator. I tried a new battery, however, on letting the new battery charge overnight, the low battery indicator was still on so I returned the battery.
I even attached the unit to a power supply, however, the low battery indicator refuses to go out. When I put the unit is on its charger the lights come on and the battery indicator indicates that it is charging - even when the lights on the base have gone out, however, when I take it off the charger, the battery indicator immediately changes to low.
Now, I am unable to download to or upload from the unit, nor am I able to get into the settings mode - all I get is an error message that says that the battery is too low to do the specific operation that I am trying. Even if I have the unit on the charger and then try to upload from the unit or try to get into settings mode, I get the same "battery too low" error message.
I could have gotten a bad battery, but when attaching the unit to a power supply that should have plenty of current to run the unit it makes me think that there is something wrong with the unit.
The remote itself seems to operate fine even after the unit has been off the charger for some time. My thoughts are that perhaps the memory in the unit has somehow gotten corrupted, and that a factory reset might clear the problem.
Is there a means, other than the reset button in the battery cover, to do a factory reset? If so, how?
Any other suggestions on what to do would be appreciated.
