Klein mm100 multimeter failing to measure battery voltage
This is a repair possibility based on the fact the fuses are okay and that none of the voltage ranges work on a manually ranged DMM. 

Assuming somewhat typical construction, you can take the thing apart and look to see if the screw- typical there is one and it is concentric with the switch axis of rotation- that holds the switch rotor in place has gotten loose. That could cause the wipers to (partially) no longer contact the PCB surface that typically acts as the contacts in cheap multimeters (photo of another brand of multimeter from this website). Do not remove the rotor entirely lest you have problems with springy parts escaping. 



This is mostly for interest. Unless it says "Fluke" on it (and even then perhaps not), handheld multimeters are hardly worth repairing at developed country labor values.