Hitachi le49a509, blue light is all that comes on, tried resetting and no luck, any advice?

A LED is a diode if one shorts the entire set goes out or on some sets there are 2 supply lines and one the top half may light and the bottom be dark or other way around

Do flashlight test to see if you can see a picture. If so the issue is with the tcon board. If no picture with flash light issue is with the inverter board that powers the led's.

Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

www.ask.com/mfg.name/make/model/operational/manual/service/

video is not coming but audio is coming

Ur power board inverter is dead.
U need a new board.

On the "Option" menu, try selecting "Service" and the "Factory Reset". This may help. If not, you will have to use the menus to manually adjust the level of blue in the projectin. Go here for the manual for your Hitachi and you will find instructions:
http://www.aboutprojectors.com/pdf/hitachi-cp-x445-manual.pdf

Good Day, ebfmays;
Check the lamp and (reboot) reset the TV by unplugging A?C cord from source wait 3 to 4 minutes then plug cord back in.
Good luck, big IRISH.

You have a defective light engine and you do not have to be under warranty for Hitachi to replace this part. We just went through this and here's what you need to do. Call Hitachi's customer relations department at 800-654-7013 and tell them that you have a defective light engine. They will act like they've never heard of this problem but they have. They will give you the names of some certified dealers in your area to call. Once a tech comes out and confirms that it's the light engine, call Hitachi back and they will send a brand new light engine to the dealer and Hitachi will cover the cost of the part (cost $1500).

Here is the deal, if you're under warranty, Hitachi will cover the part and the install. If you're not under warranty, all you pay is the install. Our install cost $400. Others on this site have paid $200. Do not let anyone tell you that you have to pay for the light engine part...you do not. Hitachi has not recalled this part but they are replacing it for free. Also, deal only with Hitachi customer realations number that I listed. Good Luck

If you've done an I2c reset then your problem is most likely the light engine. Actually the lcd panel inside the engine but the procedure is still the same - replacement of the LE..
Bill