Swapping Data East Mpu Boards

[yngbld]

Hey Guys Needing some help here, trying to swap across MPU's from A TMNT into a LW3 both are original 520 5003 03 so a straight swap with game roms and that should be it ?, however DMD cuts out upon start up, so unable to get in test menu anything special i need to know? I resat game rom still same issue anything that can help would be appreciated needing to get this guy working!

[Arcade King]

TMNT has 2 roms, a 27128 at B5 and a 27256 at C5, later games like LW3 use a single 27C512. You'll need to move the jumper from J4 to J5 to use a single 27C512 rom for LW3.

I always combine the 2 roms into a single rom for dual roms games anyway to save having to change the jumper.

[yngbld]

Thanks mate having a look at the TMMT board at the J banks I've attached a pic I am still a little green, have I got the correct jumper J4? And if so just J4 not the J3.. cheers again for the help

[Arcade King]

J4 needs to be moved to J5 so you can use the LW3 Rom.

J4 out J5 in that's it.

[yngbld]

Cheers but i have the right jumpers and looking at the right part of the board sorry if seems repetitive just want to be 100% remove j4 jumper move to j5 leave j3 as is and bingo!

[yngbld]

Got it thanks @arcade King...