flatron lcd 575lm monitor blinking white screen

[jean luc ferre]

hello,
thank you for your help and all your contributions.
i made some new tests...
lowering the resolution of the screen from 1024x780 to 800x600 suppressed all the instability; the screen remains lighted and didn't blint...
putting a coin on the gnzan1 chip for acting like a radiator made the saving energy process (color amber of the power indicator led) is happening less frequently....
so i supposed that all the difficulties came fom the operating conditions.
but i have allways a default ; i don't see the osd screen and the error message when the vga cable is disconnected...
thank you for all
jean luc ferré

[jean luc ferre]

hello,
as i said yesterday i can confirm that if i adjust the parameters of the graphic board for this flatron monitor to : resolution 800x600, frequency :56hz there are almost no cut off of the light on the screen; and the gmzan1 processor warms very less.
i also noticed that changing of pc with this time an nvdia graphic board rather than an amd/ati now i haven't no more cutt off of the display and no amber color of the power indicator led. Probably that was a matter of power options of the pc.
Now i will look why i am not displaying the desktop of the pc on this screen.
Once more thank you for all.
Jean Luc Ferré

[tom66]

If the input signal is VGA, try changing the VGA cable.

It could be such an old monitor got upset by bad video signal.

[jean luc ferre]

hello,
thank you for your answer...
the vga cable works fine with other display and pc...
i am waiting for a cooling radiator that i could stuck on the gnzan1 chip...and we will see.
i have also ordered the controler kit in order to dispel any doubt about the quality of working of the screen itself. (a new screen that's relatively expensive!!!).
thank you for all.
Jean Luc Ferré

[harp]

Changing resolution to lower one, it cause less generated heat in processor, but also less current consumption, or involving less running signals to operate, so your conclusion to do a better cooling is maybe a unclear step. I have one monitor that work in bios / boot time / dos, but blinking in graphics. The fault is a small caps on controler board which control some signal, not even power rail... I found faulty one also by changeing temperature while measuring point which fluctating. You can see in video https://m.youtube.com/watch?v=aPAeZWeJ-nw

[jean luc ferre]

Hello,
Thank you a t Harp for his answer.
i examined severa times the main controler board; and nothing strange appeared...all the signals and power rails are ok...
Perhaps it's a matter with the inverter board because tle coils l1 l2 of the filters are very hot.
waiting for new ideas.
Jean Luc Ferré