RyuX
Crossed Swords Squire
- Joined
- Sep 19, 2018
- Posts
- 179
Hey Guys.
So I have another MV-1FZ that makes me scratch my head. It seems to have Backup RAM Problems but as well will report a Bios Error with no real Address when trying to boot it up with a UniBios.
So I checked continuity from all A and D Lines from the Work and Backup RAM to the 68k.
Also I checked continuity from all A and D Lines from the System ROM to the 68k.
Those measurements where all fine.
The SNK Diagnostics Bios will give a Bios Checksum Error as well.
And as you can also see you will see those weird patterns on the screen.
Judging by how I received the board someone might have pulled it out of the pacific ocean or something as it has residue of dried up dirt/water (kind of).
I did a dish washing and cleaned the whole board with IPA and a brush and reflowed all of the parts with the same results.
Also the Backup RAM have been replaced as well as the HC32. There is no battery damage.
Maybe someone can help me out a little bit before I start replacing part after part and taking off the LSPC2-(A3) and the B1.
Thanks and have a good day
So I have another MV-1FZ that makes me scratch my head. It seems to have Backup RAM Problems but as well will report a Bios Error with no real Address when trying to boot it up with a UniBios.
So I checked continuity from all A and D Lines from the Work and Backup RAM to the 68k.
Also I checked continuity from all A and D Lines from the System ROM to the 68k.
Those measurements where all fine.
The SNK Diagnostics Bios will give a Bios Checksum Error as well.
And as you can also see you will see those weird patterns on the screen.
Judging by how I received the board someone might have pulled it out of the pacific ocean or something as it has residue of dried up dirt/water (kind of).
I did a dish washing and cleaned the whole board with IPA and a brush and reflowed all of the parts with the same results.
Also the Backup RAM have been replaced as well as the HC32. There is no battery damage.
Maybe someone can help me out a little bit before I start replacing part after part and taking off the LSPC2-(A3) and the B1.
Thanks and have a good day