Amiga 500 REV 5 black screen
 

Hi,have a mainboard from amiga 500 rev 5,when power on received a BLACK SCREEN, try to disconnect all,tested with scart cable and PSU only (working) any idea for this problems?

It can be CPU, Agnus, Denise, a CIA chip, Gary, KS ROM, reset circuit etc etc, basically anything. Best way to start diagnosing a black screen is to find another working A500 and start testing the ICs one at a time.

Can you tell whether you get a black scren (with sync) or no video output at all?

Thanks! the problem is KS replaced with another one!