Strikers 1945 Hong Kong Bootleg GB ram and rotation issue. PLZ help 😉

[Barth0lin0]

Hey !

got a "fully working " Strikers 1945 bootleg PCB . Got most of my money back since there was a few issues with it. i managed to fix the non working sound but there is a bigger issue with it.

I cannot rotate the display even with the right dipswitch turned on (SW2 Dip1). As you can see on my pictures, the pcb detects the Dip 1 being turned on but the display is still upside down.

I also get à BG RAM issue on startup (see pic) . Games seems to play fine ....upside down ...Can this be related ?

PCB is clean. no apparent PCM dammage.

Any help ?

thx

 

[kuze]

Most likely the bootlegger that made that version did not actually implement screen rotation on that PCB, thus why the DIP switch doesn't do anything

 

[stj]

remove the actel chips from the square plcc sockets - then put them in again.
the wiping action will clean the contacts.
and check if the sockets are bulging out at the sides - some crap sockets warp over time.