My 5th gen 30GB video ipod is not recognized on my PC and itunes, it only turns on and plays music when plugged to an adapter, when removed from the adapter it goes blank.If connected to a USB port it displays"please wait very low battery" . So i decided to reset and to put it on disk mode, after several trials, I eventually put it on disk mode, when connected to my PC, the "please wait very low battery returns" . This is really frustrating, I've been up all night trying to solve this mess, yet no hope. Can anyone help me?

Newer iPods are unable to sync properly with any program other than iTunes. You will have to use iTunes in order to sync songs.

is it recognized in itunes? sometimes you have to reset your ipod by holding down the middle button and the menu button. or in some ipods its middle button and play pause button

Hmmmm check wit the data cable once.. try using different USB ports els different data cables itself..

- if cable workin fine den try doin a hard reset.. i.e with d iPod plugged in 2 d comp try resetting iPod..

-Els check if ya iPodz getting recognized in iTunes.. if itz gettin not gettin recognized reinstall the itunes software.. or follow dese steps-
1>www.apple.com
2>Click on the tab SUPPORT
3>Select iPod+iTunes
4>Select iPod nano 4 r 5th gen
5>U'l find many divisions as get started troubleshooting n al.. under troubleshooting d 3rd link i.e iPOD DOESNT APPEAR IN ITUNES n follow d steps

-if itz gettin recognized in iTunes n not gettin recognized in comp den follow d same steps til troubleshooting.. under dis go to d 4th link i.e iPod is not recognized properly by computer when USB drivers are not installed properly r out f date..

Try wit al dese steps.. hope sumthin works out 4 u..
If none f dese work den derz another step to it.. may b disk mode step which am not sure f.. try finding out regardin diskmode n may b dat'l help ya..

I found this article on apples web site I thought it might be helpful

http://support.apple.com/kb/TS3218

Absolutely, I have this myself. My 5th Gen works great, but the 160GB would not show movies, just played music. Apple has an adapter cable set that allows you to hook your Ipod to your TV. $50 buy it! You can charge and watch your stuff on your flat screen. It also unlocks your Ipod TV out setting for your Video 55. Set you IPOD video setting to TV Out: on, select your movie and play. Plug in the IPOD nip to your Ipod then set your Ipod into the Video 55. A bit of a pain but works flawlessly. If you select a different movie you have to do this all over again.

put your ipod in disk mode by following these steps.
press and hold the Menu and Center buttons on the clickwheel. when you see the apple appear, switch your fingers to the center and play/pause buttons.
whena check mark appears plug it into you computer and it should detect and mount.
add music and have fun.

Try this: turn off your ipod, hold the home button, and plug it into itunes while still holding the home button until a picture of the itunes symbol appears with a cable under it. itunes should say "ipod found in restore mode". This will completely reset your ipod, hopefully fixing any bugs or problems in it. also, you will lose all data saved on the ipod that isn't also backed up by itunes. Music, pictures, and video can be re-synced.

buy a new thing to conect your ipod to your computer

do you have an AC charger? plug it into AC charger and then connect it to the computer.
it happened to me to with my toshiba mes30v 30gb mp3 player. when i connected it to the pc with the player powered by AC charger, it worked fine =D
hope that helps

You should try using a different USB cable as it's very possible the cable is damaged. If that's not the problem, the logic board is probably defective and you can either replace it if you're comfortable enough opening your iPod or sell the iPod listing the defects on eBay.