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Turned out we had the wrong driver for the USB/Serial adapter. I have a 64 bit OS on my laptop, I had the 32 bit driver loaded. Got the update installed this afternoon, going up for a flight in a bit to ops check everything. If I continue to have problems with the EFIS booting properly I will...

Sounds good, I will call Monday. But yeah as soon as I plugged in the EFIS it went to the yellow screen. And it stayed there. I did let the EFIS sit overnight with the battery running so I'm sure it died overnight. I'll go up there today and go up for a flight and get it all charged up again...

I currently have firmware version 5.2.0 on my D-10A EFIS. I was attempting to update to 5.4.0. I installed the driver for my USB to Serial Port adapter. And got my laptop to recognize that. Next I plugged it into the serial port for the EFIS and immediately the EFIS came up with a page that...

Thank you sir!

Quick question, if I have a really old version of the firmware currently installed, do I need to install each individual update all the way up to the newest? Or will installing just the newest version install all updates? Thanks!