Screen not illuminating

  • Thread starter Thread starter Martyn Arthur
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Discussion Overview

The discussion revolves around troubleshooting a non-illuminating LCD screen compatible with an Arduino Uno. Participants explore potential causes for the issue, including wiring and previous functionality.

Discussion Character

  • Technical explanation, Debate/contested, Experimental/applied

Main Points Raised

  • Martyn describes the setup of the LCD screen, including connections and power supply, and notes that the screen was previously functional.
  • One participant requests a link to the display's datasheet and inquires about any events that may have led to the screen's failure, such as physical damage or incorrect connections.
  • Martyn expresses uncertainty about the wiring and whether it should allow the screen to illuminate, seeking confirmation from others.
  • Martyn later acknowledges a mistake in the wiring, suggesting a possible resolution to the issue.

Areas of Agreement / Disagreement

The discussion includes some uncertainty regarding the wiring and functionality of the LCD screen. While Martyn identifies a wiring error, it is unclear if this fully resolves the issue, and no consensus on the overall problem is reached.

Contextual Notes

Participants have not confirmed the exact nature of the issue, and there may be additional factors affecting the screen's functionality that remain unaddressed.

Martyn Arthur
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TL;DR
problem checking bacground on this;Compatible with HD44780 1602 16x2 Serial LCD White Character Blue Backlight Display Board 3.3V 5V Compatible with Arduino
Hellol I have pins for this; apologies for subseqquent bold; bold option is not responsive.

Compatible with HD44780 1602 16x2 Serial LCD White Character Blue Backlight Display Board 3.3V 5V , Using Arduino Uno.

15 and 16 connected; 16 to gnd via a 220ohm resistor and 16 to 5v. Mtest meter reads 5v but the screen is not illuminating.

It had previously been functional. Is any other test possible or is i that the module has become faulty?

Thanks
Martyn

PS: mentor adjusted to remove bold text.

It wasn’t bold tagged it was bracketed by [ head ] tags and that’s why it didn't unbold.
 
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Can you link to the display's datasheet?

Martyn Arthur said:
It had previously been functional. Is any other test possible or is i that the module has become faulty?
Did anything happen as part of it starting to not work? Did it get dropped or plugged in wrong or anything else like that? Is it only the backlight that is not working (can you see dim characters without the backlight?)?
 
i don't know of anything untoward. Originally just the screen functioned with no characters then it just gave up. Am I correct in believing that the wiring previously described is such that the screen should illuminate?
Thanks
Martyn
 
Ah got the wiring messed up, ok now; apologies for having wasted your time; thanks for your patience!
Martyn
 
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