I have a mitsubshi flat screen that has a screen with event info billboard 999 that wont go away what can be done

Check fluid level. Fluid should also look reddish in color. May need Trans service done. Sounds like valve body is sticking.

Any weard sounds? What software it use? had it been damaged mecfanikaly? after what event it started to do this?
Basicaly nead more info

Most commonly the padding around the battery compresses (is this a fixed battery or removable (easily) by user such as older Nokia phones, or fixed like iPod and iPhone? If you have had a bettery replaced, and it is fixed, the padding has probably compressed, or the glue was not reapplied thickly enough and the battery is "bouncing" on the contacts.
If your phone works with screen facing down - the phone upside down, facing screen down on a flat surface - this will 90% confirm the issue.
If removable battery ensure no clips have broken from near base of battery compartment. This has been common in the past and will cause the battery to "drop" away from the contacts. Some foam adhesive tape may resolve your issue.

Hope this helps!

Does it stay on briefly and have a solid blue screen and then shuts off?

In the unlikely event that you really want to do that, the quickest and dirtiest way is to delete the specific mailbox and reinstall it.

The more elegant way is to forward the messages to another box and delete that one.

Both events are done in system programming and/or from mailbox 999.

Carl

******** olevia

never buy another Mitsubishi again, it's sad that everybody has the same problems, you pay for a high end tv and i've had more problems with it than any other tv

check the timing belt ho be sure it hasent slipped off time or even broke

Hi
The inverter is in the laptop screen, not the base.
1 remove the screw covers and then the screws surrounding the laptop screen
2 gently prise the screen bezel away from the screen, best done when the laptop is opened out almost flat
3 the inverter is at the base of the screen, gently unscrew and unclip the inverter from the LCD screen
4 take replacing the inverter to make sure all the leads are safely housed

5 replace screen bezel and away you go