Solve : Backlight help?

1.	Solve : Backlight help?
Answer» I replaced a backlight and it worked good. 3 days later it went out again. So I'm trying to fix it again. The SOLDER joints still looked good. I re-soldered each and it still won't come on. It appears the bulb has BURNED out again. Could something be causing it to burn out? This backlight went out about 4 years ago and it was replaced under warranty. I'm thinking it might be the inverter. Could that be burning out the bulb? Can I check the voltage of the inverter with a multimeter? Is there any way to find out if this is the PROBLEM? I know I'm going to have to replace the backlight again, but should I ALSO replace the inverter? I don't want to burn out another one. This is a Sony Vaio PCG-GRT170I still need help. Anyone?Not an expert here but it could in fact be the inverter. Is the laptop not under warranty ANYMORE?

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