Some games dont boot

[dany32412]

hey guys ive had my mame machine for awhile now but one problem that i never relay fixed was when ever id put some games on like for example pacman, tekken, street fighter, mario. just to list a few. and when ever i would try to boot them they would just start up and go right back to GameLauncher. ive tryed diferent types of the same rom and non of them work. what can i do to fix this.
thanks

[cboy]

do they work if u run it straight from mame?

if you are using a front end maybe you have the error messages disabled so u cant tell whats wrong and it goes back to the front end....

[surface tension]

Do you have a ROM set that matches the MAME version?

[u_rebelscum]

And do you have the parent set, bios or CHD, if you're playing a clone pacman, a game that needs a bios or chd (some of the SF games need one or the other)?  (mameDevFAQ)

[dany32412]

okay thanks guys any ideas on where to get these CHD files like a data base.

[u_rebelscum]

Asking for ROMs or CHDs is a no-no on these forums, as well as answering, even hints.

If you start mame from the commandline, it will list what's missing.  And MAWS will list what each game needs, as well as whit versions there were changes in the sets.