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M3900 Multimeter Malfunction, can it be fixed?

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Hi all,
A digital multi-meter (model - M3900, made by Mastech, bought last year ) is behaving in a strange manner. The display is not instantaneous like my other cheap one. It's showing a slow and gradual display of the reading.

For example, suppose I am taking a measurement of 12V AC, it is showing like 8....9....10....11.....12
and when I remove the probes, its going down like 11,10,9....0
And it's taking a considerable amount of time unlike my other one.

Can it be fixed?

Any help will be really helpful!
Thanks in advance.

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