Repairing a digital multimeter?
I believe your multimeter appears as seen below.  

If so: 

(1) Orientation fixed?: I would have expected the dial to be able to be fitted in only one orientation on the shaft - check and see if this is the case.

(2) Continuity beeper:

(1) Connect a probe as shown by red line on photo below from COM socket to Volt-Ohm socket (2nd to right and right most sockets).

(2) Turn selector knob through one turn, stopping briefly at each location.
 Meter should produce high pitched sound when dial is set to "continuity beeper" position shown by arrow on photo.  

(3) Ohms:  Similar to what OX6d64 said:

(1) Insert two probes in right two sockets as above and connect a low but non zero resistor between the probes. 1000 Ohms is probably good. 

(2) Rotate dial while observing display.

When turning clockwise the Display should read appropriately for  1000 ohms  on the Ohms positions ie  (ignoring decimal point). Approximate reading in each case.

20M = 0
  2M = 0001  (or 0000 or 0002)
200K = 0010
 20K = 1100
  2K = 1000
 200 = 1999 or overload

It MAY  beep as above on the next range (continuity) but at 1000 Ohms probably not.

It should show about 1000 (probably) on the next range (diode test) dependimg on the test current (if 1mA).
  and then read zero on the next 22 positions (DCA, ACA, ACV, DCV)

The sudden change from 200 mV DC = 0 to a reading on the Ohms ranges will be clear. Note that the 20M range MAY not show a reading with 1K.