I am (was) in the process of installing a 7" lilliput VGA touchscreen into a TM-701L in-dash enclosure. This is how I was wiring the new front buttons from the TM-701L enclosure to the VGA/TS controller:
As you can see each button on the lilliput button board was wired to its corresponding button on the TM-701L button board. I did this instead of wiring the TM-701L buttons directly to the ribbon because my soldering iron tip really isn't small enough (I tried doing that before and had to cut off part of the ribbon and re-strip it).
Everything was working fine. All the buttons worked on both the original lilliput button board and the new TM-701L button board, and also the infra red with the lilliput remote was working.
Then I tried screwing the TM-701L button board back onto the front of the enclosure and hooked up the power again and the buttons weren't working but the infra red was. I tried pushing the buttons on the original lilliput button board and they did not work either. So I unscrewed the TM-701L button board from the front of the enclosure and tried looking at my soldering points to see if any were broken. I found a broken one (not the power button) and soldered it back together.
I then put the power back in just to check all the buttons were working again. Nothing happens. Normally when you plug in the lilliput all the blue LEDs light up for a second on the lilliput button board and then the red power LED stays on (signifying the power is off as opposed to green for power on).
I tried unsoldering everything I soldered so now all I had was the original lilliput button board connected to the VGA/TS controller via the original lilliput ribbon and still nothing happens. I don't understand how this could be. Everything is connected exactly how it was before I even opened the lilliput up. Did I fry something?
I really hope that's not the case otherwise I'm going to have to buy another lilliput VGA/TS controller or perhaps a whole new screen ($300!
)