This bootleg Wonder Boy has graphics errors like missing lines in some texts and missing data and/or colors in background graphics.
As a first suspecting the 315-5025 ics which are located next to the background tiles eproms and are connected to the output data lines of these eproms.
A visual inspection shows one "not so good looking" socket.
Replacing this socket with a new one brings back the board's graphics to 100% again.
Another System 1 pcb rescued, if only all repairs were that easy.
As a first suspecting the 315-5025 ics which are located next to the background tiles eproms and are connected to the output data lines of these eproms.
A visual inspection shows one "not so good looking" socket.
Replacing this socket with a new one brings back the board's graphics to 100% again.
Another System 1 pcb rescued, if only all repairs were that easy.
