Sega Genesis problem

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#1 Posted by rilpas (8222 posts) -

So, I recently started collecting Sega Genesis games, I sold my old collection when I was a kid and I've been slowly trying to build a new one.

Anyway, today I got my 4th game, TMNT: Hyperstone Heist and it happens to be my first two player game for the Sega Genesis.

So I boot it up in two player mode and the strangest thing happens: the second player is constantly walking to the right, even when no one touches the controller.

We've tried switching the controllers, unplugging them but the second player just keeps walking to the right.

anyone knows what's wrong?

#2 Posted by thecrypticodor (192 posts) -

Sounds like pin 4 is grounded out. Check to see if any of the pins in the controller port are bent are in contact with one another. If not that it also could be a bridged solder joint on the board.

#3 Posted by rilpas (8222 posts) -
none of the pins are bent as for the second sugestion... I'm afraid that goes beyond my skills :P
#4 Posted by Megavideogamer (5441 posts) -

The player 2 controller port make need to be replaced. This is easy to do but you have to get another sega controller port. Which is the same a many old computers and the Atari 2600 and the Sega master system. You could get a broken genesis and get that part. Good luck

#5 Posted by thecrypticodor (192 posts) -

Is right always being pressed even without the controller plugged in?

#6 Posted by rilpas (8222 posts) -

Is right always being pressed even without the controller plugged in?

thecrypticodor
yep. I guess the controller port would have to be replaced/fixed but I have absolutely zero skills for that sort of thing
#7 Posted by thecrypticodor (192 posts) -

[QUOTE="thecrypticodor"]

Is right always being pressed even without the controller plugged in?

rilpas

yep. I guess the controller port would have to be replaced/fixed but I have absolutely zero skills for that sort of thing

No as long as all the pins are there there's nothing wrong with the port. Whats happening is the 4th pin is constantly being grounded where it's soldered onto the board either by the 8th pin or by the RF shielding.

Basically how the controller buttons work is by connecting a specific line with the ground when it's pressed. If the line is constantly grounded it's like your holding the button down.

What you can do is open the console and look where the port is soldered onto the underside of the board and check if any of the points are bridged (connected one to another by a bit of solder) If that's not the problem then it's the aluminum RF shielding inside the case coming into contact 4th pin.

#8 Posted by rilpas (8222 posts) -
I'll see what I can do :\
#9 Posted by littlestreakier (2931 posts) -

you could just buy another genesis right? if i remember correctly they're not really that expensive.

#10 Posted by rilpas (8222 posts) -

you could just buy another genesis right? if i remember correctly they're not really that expensive.

littlestreakier
yeah they're pretty cheap, but still, a penny saved being a penny earned and all that jazz
#11 Posted by logicalfrank (1641 posts) -

[QUOTE="rilpas"][QUOTE="thecrypticodor"]

Is right always being pressed even without the controller plugged in?

thecrypticodor

yep. I guess the controller port would have to be replaced/fixed but I have absolutely zero skills for that sort of thing

No as long as all the pins are there there's nothing wrong with the port. Whats happening is the 4th pin is constantly being grounded where it's soldered onto the board either by the 8th pin or by the RF shielding.

Basically how the controller buttons work is by connecting a specific line with the ground when it's pressed. If the line is constantly grounded it's like your holding the button down.

What you can do is open the console and look where the port is soldered onto the underside of the board and check if any of the points are bridged (connected one to another by a bit of solder) If that's not the problem then it's the aluminum RF shielding inside the case coming into contact 4th pin.

I have never looked into a Genesis specifically (well, I have modded a Nomad) but I would actually guess it's the latter (pin coming into case w/ RF shilding). To fix this, you could probably just put some duct tape or just a little bit of cardboard in between the sheilding and the board. Might actually be able to diagnose this w/o opening the case by plugging a controller in the port and using the plug to pull the port/board up away from the sheilding and if it stops running to the right. Same sort of thing happens w/ headphone jacks and all other kind of ports on all kinds of devices... Gotta be careful though because you can end up hosing up the pins doing this.


Also, to the OP, this isn't something isolated to only one game, right? Have you tried a different game?

#12 Posted by rilpas (8222 posts) -

[QUOTE="thecrypticodor"]

[QUOTE="rilpas"] yep. I guess the controller port would have to be replaced/fixed but I have absolutely zero skills for that sort of thinglogicalfrank

No as long as all the pins are there there's nothing wrong with the port. Whats happening is the 4th pin is constantly being grounded where it's soldered onto the board either by the 8th pin or by the RF shielding.

Basically how the controller buttons work is by connecting a specific line with the ground when it's pressed. If the line is constantly grounded it's like your holding the button down.

What you can do is open the console and look where the port is soldered onto the underside of the board and check if any of the points are bridged (connected one to another by a bit of solder) If that's not the problem then it's the aluminum RF shielding inside the case coming into contact 4th pin.

I have never looked into a Genesis specifically (well, I have modded a Nomad) but I would actually guess it's the latter (pin coming into case w/ RF shilding). To fix this, you could probably just put some duct tape or just a little bit of cardboard in between the sheilding and the board. Might actually be able to diagnose this w/o opening the case by plugging a controller in the port and using the plug to pull the port/board up away from the sheilding and if it stops running to the right. Same sort of thing happens w/ headphone jacks and all other kind of ports on all kinds of devices... Gotta be careful though because you can end up hosing up the pins doing this.


Also, to the OP, this isn't something isolated to only one game, right? Have you tried a different game?

TMNT is the only two player game I have, so I haven't been able to test it yet

as for your sugestion, it sounds like something simple, I could probably try that