Vizio VX42LHDTV10A weird white semi circles

[shepp]

Re: Vizio VX42LHDTV10A weird white semi circles

no panel is fitted but back is still off.....what do you mean by freezing like pausing a dvd or some thing similar?

[shepp]

Re: Vizio VX42LHDTV10A weird white semi circles

when i replaced the screen onto the better of the 2 back lights there were no visable marks on it, and when its off there not there either

[tibimakai]

Re: Vizio VX42LHDTV10A weird white semi circles

no, with a spray can. duster spray held up side down sprays cold air.
or hair dryer for hot air.

[shepp]

Re: Vizio VX42LHDTV10A weird white semi circles

what when the tv's on? i could try the hair dryer to see if it speeds the process up, but i will wait for caps first

[shepp]

Re: Vizio VX42LHDTV10A weird white semi circles

well changed caps on power supply, and re-tested first picture is when first turned on and second is 4 minutes later

im thinking the lcd that ive fitted is the problem because the tv which had the bad screen had very little use and the guy i got it off said there were no marks like that before the screen got damaged so the only part ive fitted out the doner tv was the actual lcd screen, but i can live with it, dont really fancy putting a hair dryer to it, also when ive gone through HDMI from computer i can see patchs on the lcd (only on a desktop light background) so im guessing its had a lot of use so this could be why, shame the guy who i bought the lcd off didnt tell me about it

ill probably get my money back with selling the bits from the doner tv, ive managed to repair the other power board and the main boards tested ok, so fingers crossed with the stand as well i should get £80 for the lot.

if it gets worse over time ill probably try and get another doner for the screen again

[purplebird05]

Re: Vizio VX42LHDTV10A weird white semi circles

I have the same tv just replaced the caps and after I turned it on it had the same thing only lasted about 2 minutes then went away and has never came back.Maybe having it screen down has something to do with it when fixing it.

[shepp]

Re: Vizio VX42LHDTV10A weird white semi circles

I have the same tv just replaced the caps and after I turned it on it had the same thing only lasted about 2 minutes then went away and has never came back.Maybe having it screen down has something to do with it when fixing it.

cant be to sure because i never saw the screen that i fitted working as the donar tv was faulty, but im currently in the process of getting another donar tv cheap, but this time ill fix it first then remove the screen if its decent

the white marks dont come up on mine any more, but on a light back ground you can see where they are because the screen is slightly darker there

maybe its just down to the tv having a lot of use and poor lcd quality, or maybe just a bad batch of screens

when i come to remove the screen again i will see if i can fix it or investigate further and post what i find

[rblanton]

Re: Vizio VX42LHDTV10A weird white semi circles

Hello,

Does anyone have any more info about this problem? I have a 42" Vizio that has the same five semi circles across the top when turned on. Over about 20-30 minutes they seem to spread out and merge together, then eventually disappear.

[Shinju]

Re: Vizio VX42LHDTV10A weird white semi circles

Its how LG/Vizio LCD displays age with older unit, there is no fix or any rhyme or reason as to why but they go way when the Panel is on for more then 5-10 minutes.

I have had 2 LG panels and 2 Vizio LCD panels do this and sold them all and they are still working fine. Its a strange defect for sure.

Maybe the Tab bonds are causing to much heat and causing issues to the LCD layers /shrug.