Question about Philips 42PFL7432D 42 in. LCD Television

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Mi tv has a big dark stain in the screen, what

Mi tv has a big dark stain in the screen, what could be the problem?

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  • Philips Master
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You may have bad LCD panel. This will need replaced....this may be costly if not under warranty!

Posted on Jan 30, 2010

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Posted on Jan 02, 2017

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Mud stain


depends on what material is stained.. Aluminium stains can be very tricky to get clean if not impossible...some cleaners will also cause a orange/reddish stain wich will not come out unless you use some harsh chemicals to get them out. problem is it's hard to get to those chemicals. IF you happen to have a truck wash nearby where they wash the big trucks (18 wheelers)take your parts there and tell them to use some brightener on it , it's a chemical that really cleans aluminium.it may cost you a little bit of money but that stuff really works and i haven't been able to find that stuff for private sale anywhere. the number 2 reasons for stains on the bike are : 1) waiting to long to wash the bike , some types of sand/mud especially the red dirt we have down south here will stain a bike if you leave it on the bike , not only that it dries as hard as concrete and is very difficult to remove , so was your bike ASAP. 2) washing chemicals. Some chemicals / soaps when they are left too long on aluminium will leave stains as it reacts with the aluminium , these stains are almost impossible to get out.

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1 Answer

Mud stain


depends on what material is stained.. Aluminium stains can be very tricky to get clean if not impossible...some cleaners will also cause a orange/reddish stain wich will not come out unless you use some harsh chemicals to get them out. problem is it's hard to get to those chemicals. IF you happen to have a truck wash nearby where they wash the big trucks (18 wheelers)take your parts there and tell them to use some brightener on it it's a chemical that really cleans aluminium.it may cost you a little bit of money but that stuff really works and i haven't been able to find that stuff for private sale anywhere. the number 2 reasons for stains on the bike are : 1) waiting to long to wash the bike some types of sand/mud especially the red dirt we have down south here will stain a bike if you leave it on the bike not only that it dries as hard as concrete and is very difficult to remove , so was your bike ASAP. 2) washing chemicals. Some chemicals / soaps when they are left too long on aluminium will leave stains as it reacts with the aluminium , these stains are almost impossible to get out. ,,,

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1 Answer

Mud stain


depends on what material is stained.. Aluminium stains can be very tricky to get clean if not impossible...some cleaners will also cause a orange/reddish stain wich will not come out unless you use some harsh chemicals to get them out. problem is it's hard to get to those chemicals. IF you happen to have a truck wash nearby where they wash the big trucks (18 wheelers)take your parts there and tell them to use some brightener on it it's a chemical that really cleans aluminium.it may cost you a little bit of money but that stuff really works and i haven't been able to find that stuff for private sale anywhere. the number 2 reasons for stains on the bike are : 1) waiting to long to wash the bike some types of sand/mud especially the red dirt we have down south here will stain a bike if you leave it on the bike not only that it dries as hard as concrete and is very difficult to remove , so was your bike ASAP. 2) washing chemicals. Some chemicals / soaps when they are left too long on aluminium will leave stains as it reacts with the aluminium , these stains are almost impossible to get out. ,,,

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1 Answer

Mud stain


depends on what material is stained.. Aluminium stains can be very tricky to get clean if not impossible...some cleaners will also cause a orange/reddish stain wich will not come out unless you use some harsh chemicals to get them out. problem is it's hard to get to those chemicals. IF you happen to have a truck wash nearby where they wash the big trucks (18 wheelers)take your parts there and tell them to use some brightener on it it's a chemical that really cleans aluminium.it may cost you a little bit of money but that stuff really works and i haven't been able to find that stuff for private sale anywhere. the number 2 reasons for stains on the bike are : 1) waiting to long to wash the bike some types of sand/mud especially the red dirt we have down south here will stain a bike if you leave it on the bike not only that it dries as hard as concrete and is very difficult to remove , so was your bike ASAP. 2) washing chemicals. Some chemicals / soaps when they are left too long on aluminium will leave stains as it reacts with the aluminium , these stains are almost impossible to get out. ,,,

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1 Answer

Mud stain


depends on what material is stained.. Aluminium stains can be very tricky to get clean if not impossible...some cleaners will also cause a orange/reddish stain wich will not come out unless you use some harsh chemicals to get them out. problem is it's hard to get to those chemicals. IF you happen to have a truck wash nearby where they wash the big trucks (18 wheelers)take your parts there and tell them to use some brightener on it it's a chemical that really cleans aluminium.it may cost you a little bit of money but that stuff really works and i haven't been able to find that stuff for private sale anywhere. the number 2 reasons for stains on the bike are : 1) waiting to long to wash the bike some types of sand/mud especially the red dirt we have down south here will stain a bike if you leave it on the bike not only that it dries as hard as concrete and is very difficult to remove , so was your bike ASAP. 2) washing chemicals. Some chemicals / soaps when they are left too long on aluminium will leave stains as it reacts with the aluminium , these stains are almost impossible to get out. ,,,

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