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The TopTro TR25 released in June 2021, identified by its model number: TR25. The TopTro TR25 is Bluetooth compatible, has native resolution of 1280 x 720 pixels (HD), supports playback, features dual band Wi-Fi(5G/2.4G), and also an HDMI port as well as a 3.5mm audio output

Why is there a yellow stain in the middle of the screen?

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There seems to be a yellowish stain in the middle of the projector. Pls do let me know how to fix that.

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This is not a stain. It's where the LCD polarizer film has melted due to heat inside the projector. It's a common problem among all of these cheap projectors even the Toptro units that claim to not have this problem. It's a point of failure for these units. They claim the LED light source lasts for 30,000 hours but the polarizer film is lucky to last a short time of consistent use. The polarizer likely could be replaced but the problem is going to be determining the right polarizer film used in that projector (right size, right characteristics). Polarizer film can be obtained from AliExpress but the hard part is figuring out exactly what polarizer film is needed for your unit.

I know it's not the exact answer to your question but here's a link to some sources for polarizer film. If you do find the right part for your projector, please share the detail back on here to help others: aliexpress polarizer film for lcd projector - Search Shopping

Best of luck finding a solution.

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Asami Az sera éternellement reconnaissant.
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