I have a iPod Touch 2nd Generation and it has been having trouble ever since i got the IOS 4 update. My problems include my clock going forward an hour and five minutes no matter what I do, my wifi signal will drop, and even go out completely when i had full signal and i have to restart it for it to work. And my most resent problem was that 2 days ago my iPod's LCD Backlight died after turning up the brightness on it. It has came on once since then but only for a second. Here is what i have tried to fix it:

Hard reset
Complete restore of iPod
Letting it die and doing a hard reset while connected to power


It has had no trauma, or water damage to it, and i have had it for a year and a half so its not uder warrenty. Any suggestions on what to do?