You'd better change or remove that old Ni-Cd battery reminder

BIG BEAR · Dec 10, 2007

I have a 4 slot sitting in storage waiting for some attention so while reading through a few battery related articles here I decided that it would be best for me to remove my battery and lo and behold. large photo,56kers beware
battery ooze
Not a moment too soon.
BB

werejag · Dec 10, 2007

atleast you caught it early

ttooddddyy · Dec 11, 2007

Good advice, this is what happened to my 1FS after I forgot to remove the Ni-Cd battery

BIG BEAR · Dec 11, 2007

That is the photo that inspired me to remove my battery and I thank you for that.
The battery is insignificant to me when they're hard to source and have the capacity to destroy the mobo.
BB

MKL · Dec 11, 2007

You're lucky that it's the newer 4-slot with no traces around the battery, just the ground plane. On the older version the leakage would have corroded the traces that run under the battery and caused a crosshatch screen issue:

http://img473.imageshack.us/img473/7849/cn105lf.jpg

chaoticjelly · Dec 11, 2007

Thanks for the tip and for posting!

Which other models have this problem?

I have come accross this problem before on Commodore Amiga 500+ Computers and some accelerator cards.. damn leaking batteries

chris1 · Dec 11, 2007

werejag said:
atleast you caught it early

Ditto..

..
Crazily,I was looking at my cabs yesterday thinking the same thing about the batteries in them..

Lime2K · Dec 11, 2007

And this is why I've replaced mine with a NiMh battery, attached with wires away from the board.

channelmaniac · Dec 11, 2007

Lime2K said:
And this is why I've replaced mine with a NiMh battery, attached with wires away from the board.

Still won't always help. Back in my retail days (Radio Shack) I saw plenty of cordless phones where the bluish crystalline growths from the battery leakage traveled up the wires (inside the insulation) across the connector and across the circuit board!

You must still inspect the batteries regardless of the mounting.

RJ

chris1 · Dec 11, 2007

Well aint that a kick in the nuts..

After last night,thinking about this battery issue and then reading this thread this morning..I went and turned on all my MVS cabs....The last one to turn on was the 2 slot woody in my bedroom..It hasn't been turned on in over a month..
I flip it on and BAM the screen is all fuzzy with horizontal lines...It won't go into cross hatch via the service switch or with the carts out.

the screen looks the same no matter with the carts in or out..With the harness off i get a blue screen so the monitor is fine(my first thought)

I took a voltage reading from the harness and it sems to be reading below 5 volts so hopefully the power supply took a dump..
I'm going to attempt to raise the voltage in a a bit.(watching my newborn Son)
.Was thinking maybe I should pull the board out and try it in another cab first.(?)

..
I was considering selling the cab since I don't use it but this just puts the nail in it now..

Kuriakos · Dec 11, 2007

Damn! Checked my mobo today and this is what I found

*edit* - I'm retarded

FairlanePhantom · Dec 11, 2007

channelmaniac said:
Still won't always help. Back in my retail days (Radio Shack) I saw plenty of cordless phones where the bluish crystalline growths from the battery leakage traveled up the wires (inside the insulation) across the connector and across the circuit board!

You must still inspect the batteries regardless of the mounting.

RJ

True, same happens with battery cables on a car. The cables can look fine at a quick glance, but too many over look the fact that there can be corrosion within the lines.

I don't care much for saving high scores. I remove the battery as soon as I get my hands on boards.

Kuriakos · Dec 11, 2007

I don't even know where to begin...is this going to need some bypasses to fix?

FairlanePhantom · Dec 11, 2007

Depending on the extent of corrosion, you can fix the traces, but you have to get lucky.

Kuriakos · Dec 11, 2007

Any tips for removing the gunk? It feels like rubber and sticks to everything...

MKL · Dec 11, 2007

Kuriakos said:
Damn! Checked my mobo today and this is what I found

That white stuff is just silicon to keep the battery in place. It's not possible to see from your pics if the battery has leaked or not. Anyway those 4-slots are getting quite old and their batteries should be changed as soon as possible to prevent damage.

Kuriakos · Dec 11, 2007

MKL said:
That white stuff is just silicon to keep the battery in place. It's not possible to see from your pics if the battery has leaked or not. Anyway those 4-slots are getting quite old and their batteries should be changed as soon as possible to prevent damage.

Well, I have the crosshatch problem, and there is a bunch of discoloration on the bottom side of the board....

aluisi · Dec 11, 2007

well i care about scores so where is a good place to get a replacement battery?

channelmaniac · Dec 12, 2007

Kuriakos said:
Well, I have the crosshatch problem, and there is a bunch of discoloration on the bottom side of the board....

Then the battery leaked.

You'll have to remove it, clean up the silicone, remove/clean the battery gunk (Formula 409 Orange helps with this), and patch the eaten traces.

RJ

Murray · Dec 12, 2007

aluisi said:
well i care about scores so where is a good place to get a replacement battery?

I picked up a low-capacity Ni-Cd cordless phone battery from Radio Shack for mine. It's connected by wires / molex connectors now and velcroed to the bottom of the board.

raindog151 · Dec 12, 2007

oh my

hate to sound dumb, but what's the easiest way to get to the mobo on a big red? do i have to unscrew the entire back off and remove the cover/wiring to remove the battery? i've never opened my cabinet beyond reaching in the coin door to switch volume.

Capt. Lurker · Dec 12, 2007

raindog151 said:
hate to sound dumb, but what's the easiest way to get to the mobo on a big red? do i have to unscrew the entire back off and remove the cover/wiring to remove the battery? i've never opened my cabinet beyond reaching in the coin door to switch volume.

x2

SSS · Dec 12, 2007

raindog151 said:
hate to sound dumb, but what's the easiest way to get to the mobo on a big red? do i have to unscrew the entire back off and remove the cover/wiring to remove the battery? i've never opened my cabinet beyond reaching in the coin door to switch volume.

really? reach up through the coin door and unclasp the control panel, it will swing down

Capt. Lurker · Dec 12, 2007

SamuraiShodownSensei said:
really? reach up through the coin door and unclasp the control panel, it will swing down

I understand that, but do you have to remove the entire mobo? Do you just take the metal cover off, etc.?

SSS · Dec 12, 2007

GT40PWR said:
I understand that, but do you have to remove the entire mobo? Do you just take the metal cover off, etc.?

yes, remove the board. should take 2 minutes with a screwdriver

You'd better change or remove that old Ni-Cd battery reminder

SHOCKbox Developer,

Galford's Poppy Trainer

PNG FTW,

SHOCKbox Developer,

Basara's Blade Keeper

Kabuki Klasher

POCKETBIKE NUT,

Host for Orochi

Mr Neo Fix-it

POCKETBIKE NUT,

Kula's Candy

Mai's Apprentice

Kula's Candy

Mai's Apprentice

Kula's Candy

Basara's Blade Keeper

Kula's Candy

Geese's Thug

Mr Neo Fix-it

Akari's Big Brother

n00b

There's a post count?What the fuck isThat All abou

neo retired

There's a post count?What the fuck isThat All abou

neo retired