In 2011 we inherited a Sharp LC42SB45U television from a deceased family member without a manual to trouble shoot. The t.v. is now approx. 6-7 yrs. old. We recently noticed vertical lines traveling from the top of the screen to the bottom. Do you have any idea what this is? If possible could you please email me your thoughts to mrs.foo1@charter.net. Thank you, Michelle Bergin