Mimuwhen
Junior Member level 3
Hey everyone,
I just bought a new 16x2 LCD as my former one stopped working and would only display blocks on the top row. The thing is that I didn't even get to use my new one once before it started doing the exact same thing. I tried with two different programs, one with a PIC16F877A and one with a PIC16F628A, both in 4 bit. Neither of them work in either of the displays.
All wiring is correct. Checked the wires for continuity as well as the solder joints and the pads. Not a contrast problem. I also tested the 16F628A with an LED chaser program with no problem, so it's not the MCU.
I didn't find it too hard to believe that the first one had just failed but the second one I bought, I didn't even get to use once!
Is this a hardware problem? Are these known to be faked just like bad transistors? Really annoyed by this as it seems I may have just wasted my money on this replacement. How frustrating!
Attached is a picture of what the display looks like as well as the sample program I'm using to test it.
I just bought a new 16x2 LCD as my former one stopped working and would only display blocks on the top row. The thing is that I didn't even get to use my new one once before it started doing the exact same thing. I tried with two different programs, one with a PIC16F877A and one with a PIC16F628A, both in 4 bit. Neither of them work in either of the displays.
All wiring is correct. Checked the wires for continuity as well as the solder joints and the pads. Not a contrast problem. I also tested the 16F628A with an LED chaser program with no problem, so it's not the MCU.
I didn't find it too hard to believe that the first one had just failed but the second one I bought, I didn't even get to use once!
Is this a hardware problem? Are these known to be faked just like bad transistors? Really annoyed by this as it seems I may have just wasted my money on this replacement. How frustrating!
Attached is a picture of what the display looks like as well as the sample program I'm using to test it.