Re: Dell 2000FP Blank screen problem
I've been trying to get my 2000FP working again, now that I have an o-scope. It's followed the same pattern several times:
* When I power on, it shows the logo, then menus work, etc. Works for a few hours, then all buttons stop responding. Still works as monitor (as long as I don't turn it off), showing output from PC. Doesn't resync when I change resolutions. So the CPU has crashed, but all the video stuff is working fine.
* If I unplug it and plug it back in, it generally just lights all LEDs and the backlight never comes on. Sometimes the logo appears and it freezes on that, or it freezes a few seconds after. If it manages to sync to video, it'll keep working as above.
* Even after being unplugged for a day, plugging it back in gives the same LEDs. Curiously, if it's been unplugged for a while, it takes a few seconds before all the LEDs come on, but then when I unplug for a minute and plug back in, they come on instantly. It's like there's some state in there.
* If I leave it unplugged for a month, then it works fine for a few hours.
This leads me to believe that there's something more than a bad flash chip, and that switching chips is masking some other problem. Maybe a different chip puts different loads on things, or something like that.
I've been trying to get my 2000FP working again, now that I have an o-scope. It's followed the same pattern several times:
* When I power on, it shows the logo, then menus work, etc. Works for a few hours, then all buttons stop responding. Still works as monitor (as long as I don't turn it off), showing output from PC. Doesn't resync when I change resolutions. So the CPU has crashed, but all the video stuff is working fine.
* If I unplug it and plug it back in, it generally just lights all LEDs and the backlight never comes on. Sometimes the logo appears and it freezes on that, or it freezes a few seconds after. If it manages to sync to video, it'll keep working as above.
* Even after being unplugged for a day, plugging it back in gives the same LEDs. Curiously, if it's been unplugged for a while, it takes a few seconds before all the LEDs come on, but then when I unplug for a minute and plug back in, they come on instantly. It's like there's some state in there.
* If I leave it unplugged for a month, then it works fine for a few hours.
This leads me to believe that there's something more than a bad flash chip, and that switching chips is masking some other problem. Maybe a different chip puts different loads on things, or something like that.
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