tried taking the I've tried taking the battery out I've tried the 20 seconds thing and still get just a back light flash twic

[tbonetac43]

I don't know why it's not charging it's a Galaxy Tab 1 and I've did the 20 seconds button thing I've done that take the battery out put it back in thing and nothing's working what do I do oh yeah that's been sitting for almost a year now without being used

 

[Saga Lout]

It#s probably so dead that power can't pass through it so it might no work on mains electricity if it's still in the case. After a year of non use it's best to responsibly dispose of it and replace it.