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Blue screen after firmware update

Posted: Wed Jul 11, 2018 12:52 pm
by VicMan
I have a Plasma TV model PS50C450B1W. Although it is 7-years-old I only use it once or twice a week for watching movies so it is still in perfect shape.
3 months ago I decided to update firmware from T-TDT5DEUS-1004 (built-in) to T-TDT5DEUC-1024.1.

Since then some sort of bluish shade is covering the left half of the screen that is more noticeable on pale white or grey blackground. Also on images with high black and white contrast such as texts you can see a blue lines on the left side.

I believe this color distortion may be caused by the new TV menu since the area affected matches exactly with the size of the new menu. Plus when an element of the menu is being displayed on the center of the screen the blue shade right on the left of it disappears.

Finally, my model includes an option called "Alternative Software" (backup) which should enable me to change the software to the previous version. But I can't seem to do that either. I wonder if I'd need the built-in software downloaded into a USB in order to activate that downgrading option.

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Re: Blue screen after firmware update

Posted: Fri Jul 13, 2018 1:18 am
by VicMan
I see this forum is full of successful downgrading experiences. I hope somebody can help me with mine.

Re: Blue screen after firmware update

Posted: Fri Jul 13, 2018 11:07 pm
by VicMan
Would "the zero" firmware work on my tv model? Please I need help SamyGo!

Re: Blue screen after firmware update

Posted: Mon Jul 16, 2018 10:50 am
by juusso
If you find zero for your tv then it must be working. Or get root and toogle firmware to previously used one. Forum is full of howtos for c series.

Re: Blue screen after firmware update

Posted: Mon Jul 16, 2018 10:59 am
by VicMan
Thank you juusso. The only zero I have found is for T-VALDEUC. I need for T-TDT5DEUC. You know if there are others available?

Re: Blue screen after firmware update

Posted: Mon Jul 16, 2018 11:00 am
by juusso
Iirc nope. Any for your tv...

Re: Blue screen after firmware update

Posted: Mon Jul 16, 2018 11:14 am
by VicMan
What about getting the original built-in software T-TDT5DEUS-1004 into a USB and see if that may activate the "Alternative Software" option in the menu?

Frankly I don't understand why my model does incorporate a downgrading option in the menu that is not functional.