Battery charging,and can't run laptop on battery

I would have the battery tested out and see ,it may be simple as that.

is on the left of the board http://www.pcspezialist-regensburg-notebookservice.de/product_info.php/info/p21684_mainboard-fuer-medion-akoya-e5411.html

check the screen cable first. as it does not always happen. tilt the screen front and back to see it at some angles the split stop then you can confidently say it's the cable

This is a hard drive issue or windows have corrupt files, if you have the installation disc try and reload the operational system, if no change! have the hardware checked out at a computer repair store.

I would think that the power supply, if connected, is having some issues and not supplying what it needs to for the notebook. If power supply is not connected, then the battery is defective or needs to be charged (which may not due to bad power supply). Try another supply (perhaps aftermarket universal in the store?) to see if anything changes.

turn off the notebook and press and hold the power button of the notebook for 10-15 secs and after that try to restart the notebook and see .

TRY THE F3 FUNCTION UPON START UP-I HAVE A MEDION AKOYA P6612, AND IT WORKED ON THAT

reinstall the operating system

i have the same one, i find when i upload certain programs, or run to many programs at once, it just cant cope. also, have you installed a second anti virus on toip of the trial one that came with it? if so, try uninstalling one of them to ease up on the power demand. also try Fn+f6 to turn off the web cam, and basically just turn off anything you can, then disconnect AC and see if it stays running..
if all else fails, aldi give replacements within the 30days!

It sounds to me like some of the cells in the battery has collapsed.

A 12 volt light doesn't use as much juice on the battery as when you boot up. When Mobo, Monitor, Harddrive etc etc. start up they all use a large start-up-current and if the battery cant sustain the amount of amp. they all need together, nothing happens.

This is called shadow-charge, the battery seems fine, but when it really needs to put out some power it collapses.

I think you should try to sniff up another battery and see if this one has the same problem.

Or perhaps investigate wether or not you still have some warranty left on the battery, to try to get a free replacement.