DC adapter not supplying current
As others suggest, you may have done violence to your metre fuse.
MOST meters will blow their mA range fuse if shorted across a power supply.

Connect, say, 47R across 5V supply.
Measure the voltage.
If the voltage is still about 5V, the supply is just about OK.


I = V/R  
I = 5/47 ~=  106 mA.
Enough for  a test.
Power = V2/R = 5 x 5 / 47
-~~ 0.5 wATTS.
Use 1W 


Or use a smaller still resistor to get larger test currents - but 47R should be enough to check.