Issue With My Tektronix 2430A

[CrustyCowboy]

I purchased a Tektronix 2430A from a flea market today. It passes all of the startup tests. When I press the Menu Off/Extended Functions button, it won't exit the testing screen.
I've watched videos on YouTube to see what I am doing wrong but from what I can see, I'm doing it right.
Any advice would be appreciated

 

[Delta Prime]

Have you tried the Tektronix website?
The Tektronix 2430A service manual can be downloaded Here.

 

[CrustyCowboy]

Have you tried the Tektronix website?
The Tektronix 2430A service manual can be downloaded Here.

Yes, I've downloaded it and have looked through it more times than I can count. I'm not seeing it in there

 

[Delta Prime]

all it needs is a new NV ram battery. (just did this hours ago for same reason,)
the book is clear, it says and I simplify, if CKsum fails, ignore all other errors !!! (that is because all amp offsets are lost and all self tests will fail)
all 2430s do this and is a simple fix,
replace the battery Keeper-II (early models, like mine is)
or if no keeper bat there. (last models are)2430a , replace the Dallas Nvrams DS-nnnnn SRAM, they have a battery inside.

Tektronix 2430A halts - Page 2

Tektronix 2430A halts - Page 2

www.eevblog.com

 

[CrustyCowboy]

all it needs is a new NV ram battery. (just did this hours ago for same reason,)
the book is clear, it says and I simplify, if CKsum fails, ignore all other errors !!! (that is because all amp offsets are lost and all self tests will fail)
all 2430s do this and is a simple fix,
replace the battery Keeper-II (early models, like mine is)
or if no keeper bat there. (last models are)2430a , replace the Dallas Nvrams DS-nnnnn SRAM, they have a battery inside.

Tektronix 2430A halts - Page 2

Tektronix 2430A halts - Page 2

www.eevblog.com

Since I've had it the CKsum passes everytime, except for once. After restarting it after it failed, it's passed everytime. How can I tell which model 2430A I have? What's your thoughts?

 

[Delta Prime]

. It passes all of the startup tests. When I press the Menu Off/Extended Functions button, it won't exit the testing screen

Apologies if you already have these two documents.
information on the self test and diagnostics is found in Appendix A.