I'm trying to fix an RJ45 (CAT5/6 lan cable) tester and I need to replace some LEDs and diodes (SMD and not through-hole).
The tester has 8 LEDs (one for each wire) and only a few are blown so I tested some good ones with my multi-meter.
The LED on the multi-meter showed 1.8v forward voltage and measures 2.0mm x 1.3mm so I'm assuming 0805, but how do I know the correct replacement without knowing the current?
There is also another component which I think is a zener diode. (black with a white line on one side). It measured 0.6v forward voltage and 1.7mm x 3.15mm so I'm assuming 1207 size. Can I replace with any 0.6v forward voltage diode?
Here are pictures of the PCB: