High contrast lcd not working

Other Hardware Displays
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Yes they are correct

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Digital MultiMeter (DMM).

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Yep no solder bridges

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One more thing my i2c board doesn't have a jumper here should I bridge it?

16939259692692023950697010211776
169392596926920239506970102117761920×2560 319 KB

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If your wires are just popping off, none of them are reliable. To make them reliable, all the wires need to be:

  1. Labeled
  2. De-soldered
  3. Cleaned
  4. Re-soldered
  5. Continuity verified
    wires
    wires1920×2560 317 KB
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