ST30 dimming when using HDMI content: photo/graphics - AVS Forum
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post #1 of 5 Old 01-15-2012, 07:33 PM - Thread Starter
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Does anyone else have the problem of having their panel brightness automatically revert to low when using custom mode (edit: any hdmi content type). It happens around 5-10 minutes after I reset the panel brightness to high. Any idea how to keep it from doing that? (this is with a TC-P42ST30 built in April with the FB fix via SD card)

I.e. I'll set the panel brightness to high, then 5-10 minutes later I'll notice that the brightness looks dull, so I go into pro settings and although it will say it's set to high, if I change the brightness from high to mid the image will actually brighten instead of dimming, and then moving it back to high will brighten it further (meaning it was actually on low).
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post #2 of 5 Old 01-16-2012, 09:52 AM - Thread Starter
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No one else has this problem? It's starting to become a deal-breaker because I have to constantly change the panel brightness back to high (high doesn't seem to affect gamma/saturation with content: graphics like it does with content: off, so I use high).

edit: Here's the sequence of events if anyone else wants to try it out (confirming that others see it would be a big help)
1. Using any HDMI content type in custom mode
2. I go into Pro settings and change the panel brightness to high. The image is bright, color-accurate, and colors pop.
3. I watch TV normally for about 5-10 minutes, and then I notice that the screen has become dim.
4a. I pause the TV and go into pro-settings and change the panel brightness from high to mid. The screen actually brightens when I do this, instead of dimming like you think it would. When I change it back to high, the image brightens further. This means it actually reverted to low in step 3, even though it says it remained on high.
4b. Instead of changing it from high to mid, I change it from high to low. The screen flickers briefly but panel brightness remains exactly the same.
5. Steps 3-4 repeat indefinitely while the TV is on. If it's in between steps 3 and 4 and I restart the TV, it will brighten again and be after step 2.
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post #3 of 5 Old 01-16-2012, 03:18 PM
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i use mid panel brightness and hdmi but i dont use photo/graphics settings
you can only use mid panel brightness in custom mode. if you are useing any other mode
like cinmina and standard its low panel brightness,, try another hdmi slot and see if it happens or call up panny
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post #4 of 5 Old 01-16-2012, 03:23 PM - Thread Starter
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Quote:
Originally Posted by tazz3 View Post

i use mid panel brightness and hdmi but i dont use photo/graphics settings
you can only use mid panel brightness in custom mode. if you are useing any other mode
like cinmina and standard its low panel brightness,, try another hdmi slot and see if it happens or call up panny

I'm using custom mode. Happens on all HDMI ports. I emailed panasonic and they're forwarding it to their engineering team.
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post #5 of 5 Old 01-17-2012, 10:31 AM - Thread Starter
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