I had that same problem. It's poor design on the circuit board. Basically,
some components are moutned too close to the board and heat up. You can fix
it yourself by unsoldering and resoldering some components with some
clearance, but it's a hassle.
I bought a pre-modified board from this guy:
I did it over a year ago, and everything still works great.
It's pretty easy to replace the board. He includes detailed instructions.
"Alex" <firstname.lastname@example.org> wrote in message
>I have a '99 Ford Explorer with the Mach sound system. For the last 3 years
>the display has been blank. About once every 6 months, usually during a
>major weather change, the display comes back and stays on for a few hours.
>I have looked all over for an explanation and noticed many articles that
>refer to a "well documented display problem with the Mach stereos." I have
>found many links to a supposed solution that you have to pay for and yet
>more links referring to that solution as bogus. Apparently it has even been
>discussed on these boards because I found an article referring to it in
>directly (someone had a '96 with no mach system and wanted to differentiate
>themselves from being thrown into the group with my issue), but no direct
>discussion of the solution.
> Does anyone on here have the definitive diagnosis and solution to this
> problem? Would you please share it?
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