Dell Inspiron 600m: Backlight or Invertor Problem

I have a dell inspiron 600m laptop and my screen is dimmed out. If I turn of my laptop and restart it, the display will come on for a second ( but it is a little bit reddish) and then I hear a noise and it light goes off, and I can;t see anymore. However, I am sure the computer is still running properly

I am sure that the computer is on, and is functioning properly for two reasons:
1- if it is sunny, i can see my desktop, and what ever I have open, be that a browser, a word document, so on and so forth
2-when i connect my laptop to an external display everything is fine...

I noticed there was a thread to a similar problem, but there was no definite answer to whether it was an inverter or just the back light that needs replacement.

I really appreciate any advice....
Thank you

 

Mine has a similar problem. When I turn on with battery and then plug in power source the backlight goes out. I presume its some sort of power surge or short happening and need to know if it's fixable or worth it. Computer work fine.

 

The "reddish" is the giveaway. It's the backlight inverter. It is a pain in the rear to replace, but do-able. Order the backlight kit... which contains a new fluorescent bulb and the inverter, usually.