I ended up replacing the 5V USB charger with a 12V power supply. So, I knew the USB charger was not putting enough power to power the clock. The display lighted up as I increased the voltage. So, I started by running 1.5V and started to increase the voltage directly to the display until it lighted up. I didn't know how to check the mA with the Fluke. I used to have a meter that was made in Japan but it only last for couple years. Something cheap, reliable, and can last for years from China. I don't know how to check this with the Fluke 73. So, I wanted to check if there was enough power (mA) going to the display. I then checked if there was a voltage going in to the display. I first checked the charger to see if it put out 5V. One time my friend brought me a digital clock that uses a 5V USB cellphone charger. Would you guy give me some pointer for a cheap meter please? Muchas gracias! I don't use the meter everyday but I do want a meter that works when I dig it out from my garage. It comes with a Limited Lifetime Warranty. I also checking out the Greenlee DM-65 for $50. (I really want a free bag.) But it only has a 1-year warranty. It comes with everything I need except a bag. I come across this AmazonCommerical 90DM160. So, I check Amazon to see what meters they sell there. But the reading will just jump up and down. A friend of mine always bring me small electronic gadgets for me to fix. First timer here, This is a great forum to learn electronics.
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