- Joined
- Oct 19, 2008
- Posts
- 867
Hi guys
So since my 1fz lost its sound due to an z80 error, i went and got my mv4 out of storage
Last time i used it was probably ~8y ago, it worked fine.
Now, all I get when trying to power it up, its an Solid light blue picture.
(Will post a picture later)
I've taken the upper board out, and with just the bottom board connected, same thing, just an solid light blue picture .
Went and check the current
( using an wall PSU 5v @8amp) , since the mv4 is +5v only modded
At the jamma pins ( with just the bottom board):
- getting +5.13 to +5.15 v
(this seems good)
- getting around 2.1 AMPs on the +5v jamma ( not sure of this is OK)
I've already recapped some of the bottom board caps with new ones , no change
No battery leak damage, since I took the original battery out when I got it ~9y ago
Checked DIP switch's , they all seem good, putting all of them ON, doesn't get to work ram test, just the same light blue picture
Any hints, to what I should check now?
Much appreciated, I would love to revive this board
So since my 1fz lost its sound due to an z80 error, i went and got my mv4 out of storage
Last time i used it was probably ~8y ago, it worked fine.
Now, all I get when trying to power it up, its an Solid light blue picture.
(Will post a picture later)
I've taken the upper board out, and with just the bottom board connected, same thing, just an solid light blue picture .
Went and check the current
( using an wall PSU 5v @8amp) , since the mv4 is +5v only modded
At the jamma pins ( with just the bottom board):
- getting +5.13 to +5.15 v
(this seems good)
- getting around 2.1 AMPs on the +5v jamma ( not sure of this is OK)
I've already recapped some of the bottom board caps with new ones , no change
No battery leak damage, since I took the original battery out when I got it ~9y ago
Checked DIP switch's , they all seem good, putting all of them ON, doesn't get to work ram test, just the same light blue picture
Any hints, to what I should check now?
Much appreciated, I would love to revive this board