Pasky
Fug:DDDDD,
- Joined
- May 5, 2013
- Posts
- 2,844
Battery is removed.
Crystal has a 32Mhz sine wave.
NEC D4990A is getting +4.3V on power on (this seems normal, my other MV-1C gets this as well and boots fine to the cross hatch).
Neo MV-1C keeps getting stuck at green screen boot, very rarely comes up with black screen saying Calender Error. I can't get the black screen anymore but it was doing it more often when it first began.
Using a Uni-bios 3.1 free version it bypasses the error and I can boot to a game.
I'm thinking its probably the D4990A itself. I don't see any damaged traces around the NEC chip anywhere. Anything else I should check on the chip to rule it out before considering it's bad?
Just looking for other tech opinions before I try to replace it.
Thanks.
Crystal has a 32Mhz sine wave.
NEC D4990A is getting +4.3V on power on (this seems normal, my other MV-1C gets this as well and boots fine to the cross hatch).
Neo MV-1C keeps getting stuck at green screen boot, very rarely comes up with black screen saying Calender Error. I can't get the black screen anymore but it was doing it more often when it first began.
Using a Uni-bios 3.1 free version it bypasses the error and I can boot to a game.
I'm thinking its probably the D4990A itself. I don't see any damaged traces around the NEC chip anywhere. Anything else I should check on the chip to rule it out before considering it's bad?
Just looking for other tech opinions before I try to replace it.
Thanks.