My DVD IS a big problem for me. When i insert any cd in it and press close it it loads but after 3 second it automatically open it without loading the disk.

U haven't given proper details but does it happen only with CD discs or both CD and DVD?.... Btw, if it displays NO DISC before opening the case, then check if there's any dust on the optical lens or the 'lens connector multiple line belt' has some fault......

It happen both with dvd and vcd. When i press close b*tton it close but automatically open without loading. I also don't press the open b*tton but it automatically opens. Please help.

It happens when there's a fault in the drawer.... Open the case and check if the disc drawer is able to go inside upto the end without any difficulties.....

a jvc mini hifi model mx-dk51 was wrongly loaded wit a lower software. how can i flust it out.

You need the manufacturer data of pin configuration... Then you need proper cable and pc software...