Which model of Inverter Board does HP pavilion f1503 uses? My backlight keeps on dimming after 10 secs of start up. please be spefic with the model number

You will possibly, will have to replace the Inverter board, and/or the backlight, and maybe even the screen, start with an inverter board, and backlight, and if they do not fix it try the actual screen, really the only way to test without instruments is by swapping thing in & out.

You could have a faulty inverter board or a faulty CCFL lamp. The inverter supplies high voltage to the CCFL lamp and the CCFL lamp is a mini fluro tube.
Have a look at LCD Patrs WEB site for service, parts and DIY info Use this link to their WEB site :-
www.lcdparts.net

your monitor need to hardware reapair that is inverter and lamps or PWM power something wrong, you can not keep use that will become complex damage in hardware. it is not too hard to repair, you may find a computer company to fix it, please tell me where are you live.

1800652667 as soon as hurricane Ike gets done with Houston, Texas. Or www.hp.com/go/support

If you can see the backlight ,white 2pin connectors connect to invertor pCB.Look around these two connectors you should see 2 brown/yellow/red transformers with a ferrite core.These are the inverter transformers , resolder all pins and power transistors around it.
That should solve your proble.
Please provide feedback and rate this solution.
Samir.

Normal problem is dry solder of Inverter transformer and/or transistors around it .
If you can see the backlight ,white 2pin connectors connect to invertor pCB.Look around these two connectors you should see 2 brown/yellow/red transformers with a ferrite core.These are the inverter transformers , resolder all pins and power transistors around it.
That should solve your proble.
Please provide feedback and rate this solution.
Samir.

THis is a problem of the invertor board.If you are technically able you need to disasseble the monitor and resolder components around the red or yellow inverter transformers.
Samir

Check the cable wiring make sure all is plugged up right, If you have rebooted and it comes on ok than its the power cord. Remove and re-plug again

Sounds like you have a problem in the inverter board. When you shut off the monitor the powers is being shunted from the input but the inverter is still energized and thus florescent is still lit. Please keep in mind that the voltage at the inverter can be lethal, so if you plan to open it, please keep this in mind. You can try to open the case and look for a rectangular board with two set of connectors that contain two cables. This is the inverter board and there will be a warning attached. check to see if you have a solder bridge, if not on the inverter, check the power converter or interface. If this does not work, check ebay for the same monitor that is broken: I.E. damaged screen. you can swap the parts until the problem goes away. Good Luck, and do be careful!!!!

The auto dimming circuit on the ccfl inverter is out.  Replace the inverter and it should cure your problem.  Seek adult supervision for this repair. Do not try it by yourself.
srich