3G, very dim screen when on, possibly no backlight? Otherwise functions perfectly normally..help please?

iphone 3g has been off for about a month. Bought a new charger as the old cable was a bit worse for wear. Phone charged fine and turned on fine, however the screen is very dim and can only be seen when held in the light. It's possible that the backlight has failed.
Other than the backlight it functions perfectly normally - I have tried restarting, restoring, backup and resyncing, hard reset etc. but nothing has solved the problem.
This phone is a replacement for a water damaged one that I sent back to O2 and claimed on the insurance, I hope I dont have to send this one back and get charged aother £50 excess
All help appreciated
Thanks

I'm sure there are things you could do yourself, but that would void your warranty. Give Apple a call and explain the problem to them, see if you can get it serviced under warranty. Thats what I would do.

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