TV screen that goes Dark then Light advice please

i love sky · 07-05-2012, 17:18

I have a UMC 40in TV and have Sky HD via hdmi but for some reason when something changes on the screen its goes a little dark then back to normal and it keeps doing it.

Have to say it seems to do it more while watching football or cricket(Live sport).

could this be my telly or is this normal with live sport?

Sanctuary · 08-05-2012, 07:32

You've probably got the TV's energy saving mode switched on in your settings, as this causes the screen to go dark and light all the time.

i love sky · 08-05-2012, 07:38

Quote:

Originally Posted by Sanctuary

You've probably got the TV's energy saving mode switched on in your settings, as this causes the screen to go dark and light all the time.

I have just had a look to see if it does and i can not see anything about energy saving mode.

mac2708 · 08-05-2012, 07:57

If it's the UMC 40/58GF then according to some reviews it does have an Energy Saving/Eco mode.

I may pay to check the user manual and on-screen menus

i love sky · 08-05-2012, 08:17

Quote:

Originally Posted by mac2708

If it's the UMC 40/58GF then according to some reviews it does have an Energy Saving/Eco mode.

I may pay to check the user manual and on-screen menus

its a UMC 40/74G and i have looked in the on-screen menus and i can not see anything.

also the user manual i can not see anything.

mac2708 · 08-05-2012, 09:29

The UMC 40/74G does not include Energy Saving/Eco features according to the specs

Deacon1972 · 08-05-2012, 10:44

Have a look in the picture settings/screen settings menus and see if you have any digital enhancements enabled, anything that points towards contrast/brightness/black/white where the set makes auto adjustments, these should be switched off. Phillips used to have a feature called Black Stretch where it adjusted the black levels by constantly altering the contrast/brightness, the effect was just as you're describing. Unless the set is faulty I'm pretty sure something will be enabled which is making the picture go dark/light.

Skylover4life · 08-05-2012, 14:49

Yeah. My screen has Super Contrast which makes the screen change from dark to bright at random times.

chenks · 08-05-2012, 16:42

one of my samsungs does this too, even after i've turned off every one of the stupid digital "enhancement" settings.

grahamlthompson · 08-05-2012, 17:04

Do sky-Hd boxes have the option to change the hdmi out options ?

If I set my Denon amp to output Enhanced mode with 0 being black and 255 white I get the varying problem most noticebally on scrolling white titles on a black background.

Changing to normal (16 is black and 255 is zero) eliminates the problem.

07-05-2012, 17:18	#1
i love sky Forum Member Join Date: Jun 2005 Posts: 2,957	TV screen that goes Dark then Light advice please I have a UMC 40in TV and have Sky HD via hdmi but for some reason when something changes on the screen its goes a little dark then back to normal and it keeps doing it. Have to say it seems to do it more while watching football or cricket(Live sport). could this be my telly or is this normal with live sport?

08-05-2012, 07:32	#2
Sanctuary Forum Member Join Date: Apr 2001 Location: East Sussex Posts: 1,571	You've probably got the TV's energy saving mode switched on in your settings, as this causes the screen to go dark and light all the time.

08-05-2012, 07:38	#3
i love sky Forum Member Join Date: Jun 2005 Posts: 2,957	Quote: Originally Posted by Sanctuary You've probably got the TV's energy saving mode switched on in your settings, as this causes the screen to go dark and light all the time. I have just had a look to see if it does and i can not see anything about energy saving mode.

08-05-2012, 07:57	#4
mac2708 Forum Member Join Date: May 2009 Posts: 3,196	If it's the UMC 40/58GF then according to some reviews it does have an Energy Saving/Eco mode. I may pay to check the user manual and on-screen menus

08-05-2012, 08:17	#5
i love sky Forum Member Join Date: Jun 2005 Posts: 2,957	Quote: Originally Posted by mac2708 If it's the UMC 40/58GF then according to some reviews it does have an Energy Saving/Eco mode. I may pay to check the user manual and on-screen menus its a UMC 40/74G and i have looked in the on-screen menus and i can not see anything. also the user manual i can not see anything.

08-05-2012, 09:29	#6
mac2708 Forum Member Join Date: May 2009 Posts: 3,196	The UMC 40/74G does not include Energy Saving/Eco features according to the specs

08-05-2012, 10:44	#7
Deacon1972 Guest Join Date: Feb 2008 Posts: 8,103	Have a look in the picture settings/screen settings menus and see if you have any digital enhancements enabled, anything that points towards contrast/brightness/black/white where the set makes auto adjustments, these should be switched off. Phillips used to have a feature called Black Stretch where it adjusted the black levels by constantly altering the contrast/brightness, the effect was just as you're describing. Unless the set is faulty I'm pretty sure something will be enabled which is making the picture go dark/light.

08-05-2012, 14:49	#8
Skylover4life Forum Member Join Date: Mar 2008 Location: Newcastle Posts: 1,225	Yeah. My screen has Super Contrast which makes the screen change from dark to bright at random times.

08-05-2012, 16:42	#9
chenks Forum Member Join Date: Jul 2002 Location: North Ayrshire Posts: 11,399	one of my samsungs does this too, even after i've turned off every one of the stupid digital "enhancement" settings.

08-05-2012, 17:04	#10
grahamlthompson Forum Member Join Date: May 2005 Location: Redditch Worcs Posts: 17,293	Do sky-Hd boxes have the option to change the hdmi out options ? If I set my Denon amp to output Enhanced mode with 0 being black and 255 white I get the varying problem most noticebally on scrolling white titles on a black background. Changing to normal (16 is black and 255 is zero) eliminates the problem.

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TV screen that goes Dark then Light advice please