Sunday, November 22, 2015

Dell Inspiron Desktop 20 3000 Series All-in-One LCD Backlight Issue

The Dell Inspiron Desktop 20 3000 Series All-in-One has an issue with the LCD backlight. I captured a video of the issue here.

So what happened was the system instructs the screen to turn off, which it did but then the screen (and not the system) turns back on because it needs to display the message "No input". It then just leave the LCD backlight on perpetually until the system goes to sleep.

This is similar with any other desktop system with a separate display. The AIO is just the system and display built into the same housing.

However, with traditional system, when the system is set to turn the monitor off, it will simply turn off the signal from the video output in which the monitor will detect no input and will display similar "No input" message. The difference however is that the display will normally turn off after a few seconds. In the case of the Dell, it did not.

It is clearly a design flaw which can only be solved with a new firmware for the display and not the system.