weird fluke problem

[telectrix]

as title. i have a fluke 1503 ( cont./ins. tester). when using it, it fires up as normal with thew 4 ----, showing nulled leads and ready to measure. pressing the test button does nothing, but if i press the lock button, i get an accurate reading ( e.g. a 4.7K resistor reads 4.61K on the fluke). long shot, but anyone got similar fluke gear has a clue.

 

[sparkyohms]

I think your fine that will be low batteries,

 

[telectrix]

nope. replaced them.