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25Apr/120

HP 8935 E6380A EL Display Fix

I have a HP 8935 E6380A service monitor that had some pretty severe screen burn.  After looking around for a replacement I wanted to see how hard it would be to adapt a current LCD to the 8935.  Suprisingly it was fairly easy.  I had a 10.5 inch display and after probing around a bit to see what signals/power were on the A1A1 connector (400 i think) I started playing with a FPGA dev board to convert signals to something I could see on the screen.  It works but doesn't fill the entire screen and its not the right size hardware.  Now that I have a PLAN B and I've found a 6.5"ish lcd I can readily buy cheap, I'll troll along with the burnt display till it fails or I can't stand it anymore. I'm hoping there is a lot of interest in this to other 8935 owners and its something I can justify doing in the near future.

Some things I played with while I had the 8935 apart and the 10.5" connected:

- Inversion to have some way of preventing screen burn.

- Adding some color (Changed boarder color, changed color of spectrum analyzer portions of the screen) This isn't something that can be done everywhere. If its simply which pixels get what color it's trivial.

- Added text to the parts of the screen not used going from 512x256 to 640x480.  Could add ADC to show voltages etc as extra info.

-Centered screen and added border.

 

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