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The card that you used to transfer the files HAS to be (1) FORMATTED by the ESX-1 unit FIRST, (2) then put the card into your computer's card reader and download the files. (3) Put the card BACK into the ESX-1 and try reloading the factory presets. Good luck!
There is a contrast control. Look for it in your user manual. On page 14...bullet #25... You press the menu button and hold it and rotate the dial to adjust the contrast.
There are many possibilities. One is static discharge... those nasty little sparks when we walk across the rug and get zapped... or we scoot a little in our chair... one''s that you can;t even feel can send electronics into a tailspin.
Another is a possible overheating someplace in the unit. However if it comes back immediately when restarting this is usually not temperature.
Your description of the problem MIGHT indicate a problem with the D-A or digital to analog convertor chip... if so it will require servicing, probably at the factory or having a board swap by a service agent.
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