PGM motherboard not holding saves.

[theMot]

A bit of an annoying problem hopefully someone can help me fix.

I have a pgm mobo which has had the battery replaced with a flat cell cr2032 battery. Lately i have noticed that my highscores are no longer saving. First thing i did was replace the battery but that doesn't seem to fix it.

I have tried resetting the mobo and have done the ram check which came back fine but still no good. Oddly i have noticed my mobo doesnt have the toggle switch to clear the nvram but im not sure if that would help anyway.

???

[theMot]

This is the battery. Could what looks like corrosion on the trace under the battery be an issue?

photo.JPG

[Xian Xi]

You need to put the diode back in. I think it's D2, I forgot to update the tutorial on the website about it. I think it was Michele and I thought the charging circuit was like the Neo so I removed D2 but for some reason the PGM circuit has it directed in a weird way to which D2 needs to be installed and the mod done differently.

I have to look into it again. From what I remember it only affects certain games.

[theMot]

Sometimes it seems to hold the save for a few days then it drops it. Does that sound like the diode problem or if its that would it just not save at all?

[theMot]

photo-2.JPG

That is a pic of the the whole mobo. As you can see the diode at D2 is still there. :/

[kuze]

You need to put the diode back in. I think it's D2, I forgot to update the tutorial on the website about it. I think it was Michele and I thought the charging circuit was like the Neo so I removed D2 but for some reason the PGM circuit has it directed in a weird way to which D2 needs to be installed and the mod done differently.

I have to look into it again. From what I remember it only affects certain games.

So is the only difference from your tutorial that D2 can stay in place for a successful cr2032 setup on PGM?

[LegoSlug]

Shoulda saved the diode. I think I tossed it. :/

[kuze]

Well, I saw another guide or two that left out removing the diode/resistor and simply soldered the cr2032 battery holder into place. I decided to do the same and picked up a battery holder from Radio Shack for $1.25. Fortunately it fits perfectly without any modification.

0Ica6HD.jpg

I tested it out by playing a few sessions of Demon Front, then left the system off for a while. I turned it back on and my high score saves were still there, wooot! I'll try it out on some other games and will report any issues I find (if any).

[LegoSlug]

Well, I saw another guide or two that left out removing the diode/resistor and simply soldered the cr2032 battery holder into place. I decided to do the same and picked up a battery holder from Radio Shack for $1.25. Fortunately it fits perfectly without any modification.

0Ica6HD.jpg

I tested it out by playing a few sessions of Demon Front, then left the system off for a while. I turned it back on and my high score saves were still there, wooot! I'll try it out on some other games and will report any issues I find (if any).

Wonder if there is a charging circuit.

[kuze]

Wonder if there is a charging circuit.

Me too, the info out there is pretty scarce for PGM.

Edit: If it does, a ML2032 (rechargeable) coin battery should be perfect.

[Xian Xi]

Either way you need to remove the resistor as you don't want any power going to the non-rechargeable battery unless you want it to explode all over the board. If you can get a rechargeable one then even better, just leave the resistor in.

[kuze]

Either way you need to remove the resistor as you don't want any power going to the non-rechargeable battery unless you want it to explode all over the board. If you can get a rechargeable one then even better, just leave the resistor in.

Well, a ML2032 it is. Thanks for the confirmation.

[DeusVult]

so if I plan to use a rechargeable I dont have to remove any existing circuitry, can you use any other battery like this one?

http://www.ebay.co.uk/itm/2-x-3-6V-L...item5d537dc239

lir2032 but says it 3.6v where a ML2032 says its 3v