Hello folks, In a past post I stated that I re-flowed my main board to solve an issue with my front display. Everything was working great... That is ...until I installed my probe setup and had to remove the front panel.
Then the disappearing display reared it's ugly head again. Apparently, when I did the re-flow and installed the panel, I inadvertently applied pressure to a certain spot and created a good connection. I thought all was good. Till, I had to remove the front panel. It took a few days for the problem to arise, but, it did come back
I really don't care about the front display, as I do all my machining through Mach3. The big problem was that every time the display would disappear, Mach would go into an E-stop situation. Kind of a pain, especially in the middle of a part.
Anyway, I loosened the front panel and hooked it up to a separate 5 volt dc supply and began tapping the front panel. The screen would start disappearing at one particular spot. This was in the area of the ltp-1 port. I then wiggled the ltp-1 cable and the screen would disappear. I quickly assumed it may be a bad parallel cable. Fortunately, I had some cable ends and made up a new cable, using ribbon wire...
I connected the new cable , but, the problem was still there. I would give the cable a small wiggle and the screen would disappear. This kinda told me that there is a problem on the board. When I did the re-flow, I only worked on the circuit board under the main board...
Anyway, I removed the top board and thanks to my bench mounted magnifying glass and a bit of luck...I wiggled each pin on port 1 and found one of the pins moving from the backside. I re-soldered all the pins on port 1and hooked the panel to some 5 volts...wiggled the cable and this time no disappearing display
I reinstalled the panel on my mill and ran it over the past 5 days and the display has not disappeared and Mach3 has not gone into an E-Stop situation.
It's back to making parts