Tighe
Well-known member
OK, so I rebuilt the monitor on this pretty beat up SHO, the controls work but a little wonky. Fine the game is fun.
Now I am getting graphics glitches like this:

So I pull the board, it is filthy underneath and between the boards so I simple green and wash and dry them. I pull all the socketed chips clean them with Deoxit and put them back in.
Problem is still there, I check the voltage and the meter reads 15v! I shut out down adjust the voltage knob a little turn it back on and get 5.75v turn it all the way down and it reads 5.25v cycle the power the meter won't read anything, I turn the meter of and on and get 5.02v
I go into the memory test and get this:

I figure the power supply trashed 4 of the ROMs and 2 RAM chips.
So I figure I should replace the power supply which is a 5v switcher and a linear supply for the other voltages.
Also get the RAM chips and ROMs burned.
Do I even care?
Anyone replaced the power supply in a SHO with a switcher?
Now I am getting graphics glitches like this:

So I pull the board, it is filthy underneath and between the boards so I simple green and wash and dry them. I pull all the socketed chips clean them with Deoxit and put them back in.
Problem is still there, I check the voltage and the meter reads 15v! I shut out down adjust the voltage knob a little turn it back on and get 5.75v turn it all the way down and it reads 5.25v cycle the power the meter won't read anything, I turn the meter of and on and get 5.02v
I go into the memory test and get this:

I figure the power supply trashed 4 of the ROMs and 2 RAM chips.
So I figure I should replace the power supply which is a 5v switcher and a linear supply for the other voltages.
Also get the RAM chips and ROMs burned.
Do I even care?
Anyone replaced the power supply in a SHO with a switcher?
