POLAROID P40LCD12 SCREEN AT BOTTOM COMES ON BLUE FADES THEN GOES GREEN ABOUT 5 INCHES LOST ON BOTTOM

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.

I just changed out the invertor boards and mine was fixed. I had the same problem. Im not a TV repair man but replace the board thats buzzing and it will work again.

Follow the following solutions, this should fix up your trouble
1. Turn yourmonitor on. It should be on for at least 20 minutes before you continue.
2.Press the"Auto/Select" button on the front of your computer's monitor. Thescreen will be wavy while the adjustment happens. When the screen stops beingwavy, the faded colors should no longer be visible.
Follow steps 1 and 2 if you do not have a disk for the monitor.

acoustic solutions lcd tv when i switch it on the screen flashes blue, green then red no picture??? it was working ok last night any ideas?

blown cap in the power supply it will be domed on the top where it vented

this thing happened in my laptop also i got green screen fully
then when i hit it behind the screen it was gone but comes many times then again i would hit
later on the screen was completly lost then had to replace the screen
yous is a starting period so go to a nearby computer service and fix the screen

The Blue SCREEN setting is too high. These adjustments are located inside the TV behind the front panel. There are two screws behind covers and then a wooden panel to remove to access the adjustments. The leftmost set are for BLUE, the middle are GREEN, and the right are RED. The top row are FOCUS and the bottom are SCREEN. Focus will focus/unfocus the tube and Screen will adjust the power of that tube (there are 3 tubes, one for each color). If Screen is adjusted too high, horizontal lines will appear (my TV had red lines, but I played around with the knobs and saw that it could happen on any of the colors). Additionally, if SCREEN is set even higher than that, the tube could go so high that it turns the whole screen that color (in your case, blue). If this happens the TV will shut down, probably due to either overheating or overvolting. To fix this issue, turn the appropriate SCREEN dial down until the lines go away. In your case, you want to turn the lower left dial down. Don't turn it too far down, if you turn it more than necessary the TV can give you an AKB error (noted by the STANDBY light flashing a sequence of 5 blinks).

try adjusting your color tuners located inside tv behind speakers.

i have the same problem with my sony trinton tv 36 inch if you know how to fix this please email me on [email protected]

Please post me on this as well. My Sony just turned 4 yrs this Jan and just last week it started having the same problem. -Thanks!