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in SA Tech Help by User (800 points)
I have a sinotec stl-43e390m smart tv running on Android 4.4.2.

The device card is a rtd298x and running TV version rtd298x_tv001.

I performed a software update using a file that I found online. However since the update the screen has distorted color and lines running along the screen.

Where can I find and download the stock firmware

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by Guru (1,099,040 points)
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You can request this firmware directly from sinotec Tel: 011-3573777


by User (800 points)
There is never any answer on the number provided and the email address results in a delivery failure
by Guru (1,099,040 points)
by Guru (1,099,040 points)
Try this one Email:
by User (800 points)
Thank you. I will try that email address.

I just managed to get hold of someone from the company who insists that it is not possible to flash a stock rom back onto the TV. Apparently, the motherboard has to be changed in order to revert to stock which makes no sense at all.
by Guru (1,099,040 points)
You say,  you updated the TV with a wrong firmware?
by User (800 points)
I believe so. After the update, the initial boot screen logo has changed but other than that the firmware seems identical - the same launcher and default apps are loaded.

Except for the colors running across the screen, the TV is working perfectly.

I tried explaining to the technical support at Sinotec that because the software is still working flashing the stock ROM for the TV should be a quick fix and that it is probably not the motherboard (As it is running android I'm sure that someone has a stock ROM that I could flash?)
by Guru (1,099,040 points)
OK then I suggest you downgrade the firmware to the previous version.
by User (800 points)
When selecting the software update option in the android settings I would get an error stating that the current version information could not be obtained. I, therefore, performed the update by flashing via a USB.
I attempted to factory reset, but that does a factory reset using the incorrect firmware that I updated to.

I have been looking for the factory ROM in order to downgrade to the previous version.

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