modessitt
Volunteer: Encyclopedia Submission Moderator
Spy Hunter troubleshooting - FIXED!
I'm looking at a non-functioning Spy Hunter that was working when shipped. It has the MCR switcher adapter installed. The seller had the buyer check a few things before I got called out. I think the buyer messed with the switcher and cranked the voltage all the way up, as the +5 was reading over +6 at the switcher and +5.80 at the ROMs on the SSIO. I turned it back down to +5.15 at the ROMs, but it still does the same thing.
So - the game comes on, you hear the PG theme, the monitor comes up - and there is just scrolling garbage. It scrolls from top right to bottom left, is mostly blue, and usually has multiple "R"s interspersed in the garbage.
I pulled the board to take home for bench-testing, but was wondering if any MCR experts may have any ideas? Should I check the ROMs to see if any went bad from the high voltage? I tried reseating all the socketed chips and flexing the ribbon cables, but didn't see anything improve. Not sure if that would have taken care of everything before the buyer messed with the PS.
I did notice that one of the pins (yellow wire - Pin 14 maybe?) on the power connector housing looked black, like it burned or overheated. I tried flexing it to see if a bad connection there was an issue, but didn't get anything different.
Someone needs to compile a video list of pics of various MCR problems and how the present themselves on the screen...
I'm looking at a non-functioning Spy Hunter that was working when shipped. It has the MCR switcher adapter installed. The seller had the buyer check a few things before I got called out. I think the buyer messed with the switcher and cranked the voltage all the way up, as the +5 was reading over +6 at the switcher and +5.80 at the ROMs on the SSIO. I turned it back down to +5.15 at the ROMs, but it still does the same thing.
So - the game comes on, you hear the PG theme, the monitor comes up - and there is just scrolling garbage. It scrolls from top right to bottom left, is mostly blue, and usually has multiple "R"s interspersed in the garbage.
I pulled the board to take home for bench-testing, but was wondering if any MCR experts may have any ideas? Should I check the ROMs to see if any went bad from the high voltage? I tried reseating all the socketed chips and flexing the ribbon cables, but didn't see anything improve. Not sure if that would have taken care of everything before the buyer messed with the PS.
I did notice that one of the pins (yellow wire - Pin 14 maybe?) on the power connector housing looked black, like it burned or overheated. I tried flexing it to see if a bad connection there was an issue, but didn't get anything different.
Someone needs to compile a video list of pics of various MCR problems and how the present themselves on the screen...
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