I see a big blue spot around center screen - Hitachi 50V500 50 in. HD-Ready LCD Television

Bad controller board probably, other makes have this problem too.
If under warranty good, if not bad.
press the helpful button

http://www.repairfaq.org/samnew/tvfaq/tvtmmqcs.htm

Hi , it seems you are experimenting a light engine problem.Here's how your tv works: http://www.youtube.com/watch?v=ZLLHnQ4y-wo Basically there's 3 LCD chips that create the colors and image by blending together.When these chips start to melt you will get those blue spots, pixilation even vertical lines.You will need to replace the light engine. Have a blessed one!

Sounds like the optical engine is bad.It is a very common problem and for a while Sony covered the repair with a warranty extension.If you call customer support they may cover it.

Hello :
I suggest u retrace you the steps u took to replace your lamp make sure no foriegn objects got on the prism where the light shines throung the optics engine, if you remove the lamp compartment througly. If you had a perfect picture prior to replacing the lamp, then retracing your steps you might find something that does not belone. One final note: Did you purchase the right lamp 120watts anything higher than this wattage could damage your optics engine. I suggest never vacuuming the compartment because particals fly around from the suction and could get on the glass of the color wheel asembly.

you most likely have a bad light engine.

if you have a Sony LCD projection ..Theres good chance optical block needs replacing .This spot will get bigger and will eventually cover most of screen the longer you use it .needs repair.If there is no warranty on this unit..I would estimate repair around 6- 8 hundred dollars ..

you cant remove those spots as they are referred to as 'dead pixels'
im guessing your warranty is already finished, so you'll have to get in touch with the manufacturer and they might be able to give you a few names of places that can fix this in your area.
also, unfortunately, the only way you can prevent anymore would be to stop using that tv. :(

the lcd panel for the blue is bad normally you would have to replace the engine but i know a place where you can get it rebuilted for a price cheaper than the engine go to
N-home tvservice.com for some answers

lol. there is a speaker next to it a big speaker. just move it away! lol. the spots will go away.

Good Day,

Sounds like the TV's convergence circuit has failed:
*Call an Authorized Service Center and them give you an estimate cost of the repair, or
*Repair it your self; get KIT 10 locally or B&D Enterprises
1-800-458-6053; www.bdent.com.
Good luck, big IRISH.