Hi, this is my first post here.

I have just started up a Tektronix 2424L oscilloscope that has been in storage for 10 years, and I am getting these error messages after start up self-testing.

See attached screenshot.

Is there anything I can do about it, or is it a waste of time and work ?

As far as I understand, this version does not have a regular back-up battery that can be replaced, it instead has a "Dallas SRM" with an integrated back-up battery.

--Bo