Tektronix 2465B startup error

Hello!

I have got a Tek 2465B which displays this error on startup:

TEST 04 FAIL 11

PUSH A/B TTRIG TO EXIT

From the Service Manual, it seems a calibration data error. Does it
mean there is some faulty non-volatile RAM?. If so, is it replaceable
with a current type?. Any hint to fix this?

Thanks for any help!

Regards,

JOSE
http://jvgavila.com
.

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