This project has multiple posts on it’s progress:
- Beginning – 13.0.1
- VGA and Inverter Progress – 13.0.2
VGA and Inverter Progress
One of the most tedious parts of this project is manually wiring the essential connections. With the way I designed the layout, using a standard VGA cable to connect the display’s VGA in to the laptop’s VGA out, wasn’t possible. The plastic molded connector is just to big, clunky and unflexable to fit where I need it to.
So using left over ribbon cable, I hardwired all necessary pins from point A to point B.
For some reason I soldered all 15 connections to the laptop mainboard, then when I got to the otherside I actually paid attention to the pinout. Some connections are just reserves and a lot are all common ground.
You can see in the second image, there is one lonely connection going directly to one of the SMT components. The hole that would have gone though had it’s terminal damaged, and there was no way to make good contact. I will have to defiantly make a hot-glue mess on everything to make sure everything stays where it should.
I did have an issue with Pin 5 though. While checking continuity from all the GND pins to GND, I had nothing for Pin 5. Following the trace led me to some resistor down the road somewhere, but never got me to ground. So for an experiment, I’m going to leave it unconnected during the first power up to see what happens.
In my previous post, I mentioned how I had to rotate the power board for the display 180deg so that everything can fit alright. Well, the cables for the inverter portion of it that connect to the LCD panel don’t quite reach, and also have to be criss-crossed.
While I was wrapping up this portion of the project, I thought to myself that there was a possibility that the connections are cross compatible, as it probably wouldn’t matter if they were crossed as long as the colors matched. I decided to not take a chance and just be cautious by making sure everything is connected as it was.
What I actually did to correct the crossed connections, was to remove the plastic connectors from the board, and give them wires to be soldered. This is to lengthen the wires, and also to keep them modular so that it is possible to remove the LCD panel during service as you would normally.
Next is to get power to the laptop mainboard, and have a checkpoint to ensure the laptop and display still work!