Windows 7 cannot adjust HDMI output brightness display

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masri99

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Feb 19, 2012
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hi guys, i'm having trouble adjusting my screen brightness on my TV when it's connected via a HDMI cable to my laptop. If i try to increase the brightness through my laptop (VAIO VGN-SR) it does so only on my laptop display, while my TV remains the same. Instead if i try to do the opposite, adjusting the brightness through my TV (Panasonic TX-L32D25E) it doesn't change anything whatsoever. The thing is everytime i watch a movie through my laptop the screen brightness on my TV is too dark and i can't adjust it, however if i watch the other normal channels i can adjust the screen brightness without any problems. Does anybody know how i can increase the brightness on my TV when connected to a laptop? Is it an issue regarding the computer rather than the output device?
thank you
 
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it mentions to use the VAIO control center to adjust screen resolution to the output display, could that be the solution?
 
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yes see if the instructions are right im sure the hdmi will work i was just seeing what other things we could try also check what the tv says about connecting to the hdmi ports
 
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unfortunately the VAIO control center doesn't mention anything about the screen brightness for an output display
 
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i just noticed that the screen brightness on my TV does change but very little there is almost no difference between the maximum brightness and the minimum brightness, this happens only when my laptop is connected. Without it, when i watch normal channels, the brightness does significantly vary
 
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you will need a browser with a pdf reader i cant upload the tv manual because its over the 5MB limit
 
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