Need Help: Punch Out!!! glitch...what's making this happen?

[kaneda]

Hey guys, recently my Punch Out!!! started having a graphical glitch.  The boxer you are facing sporadically appears as a ghost figure in the bottom right of the screen.  Almost like a flicker.  Sort of annoying and now happens with everyone you face in the game.  Doesn't last the whole match, just random.  Here's a video and photo.  Watch glass joe flicker on the bottom right as a ghost image.

Any idea what's causing this?  How to fix?

[pbj]

Reseat socketed chips.  If you can't figure it out, I'll do it for $500.

[kaneda]

Reseat socketed chips.  If you can't figure it out, I'll do it for $500.

I'll pay you $600.   Where are the socketed chips? Do i need to solder, or just pull on and off?

[chopperthedog]

Our new Richardgregory....


good day.

[mgb]

Any IC on the game board that is in a socket.
pull the chip and make sure it goes back in the correct way.
Really the socketed chips legs should also be cleaned but if you're not familiar with this process, you can break the legs.
Also bad or very dirty sockets should be changed but if you're not up for this type of repair, reseating the chips will very possibly clear up the issue.
particularly the graphic rom chips.
 

[mgb]

The chips in the red are the ones to pay most attention to.

[kaneda]

The chips in the red are the ones to pay most attention to.

What's the best way to clean the chips before putting them back in?

[mgb]

In a pinch, you can use an eraser but be very careful.
denatured alcohol cleans well. or you can use contact cleaner.
you can even spray contact cleaner right into the sockets and make sure it dries well before re-inserting the chips

[chopperthedog]

The googles must be blocked in new york.


good day.

[mgb]

The googles must be blocked in new york.

 

[kaneda]

The googles must be blocked in new york.


good day.

Did this, but it didn't work.  All were sparkling clean, but still acting up.  hmmm...any other ideas?  Could the power source be causing this?

[mgb]

There's no adjustment for 5 volt or anything though right?

[kaneda]

There's no adjustment for 5 volt or anything though right?

Not sure.  Anyone with a punchout know?  I've ordered a Digital Multi-Meter so I can check voltage.  Also have a friend coming over with a working board sometime this week to see if it's indeed the board. 

[ark_ader]

Bah! Just Mame it.

[UFO]

MGB is spot on the money to try the leg cleaning ...

Personally, I would be posting on KLOV - there are quite a few members I know that own Punch Out.

[kaneda]

MGB is spot on the money to try the leg cleaning ...

Personally, I would be posting on KLOV - there are quite a few members I know that own Punch Out.

So I cleaned all of the legs on the chips circled in red.  Should I go and do it for all of the socketed chips? There's a lot on this 3 board PCB...

[UFO]

MGB is spot on the money to try the leg cleaning ...

Personally, I would be posting on KLOV - there are quite a few members I know that own Punch Out.

So I cleaned all of the legs on the chips circled in red.  Should I go and do it for all of the socketed chips? There's a lot on this 3 board PCB...

Kaneda, I can't help you any further, and my advice would have been the same as MGB's initially.

If you go to http://forums.arcade-museum.com/ and ask there, I feel you may have a better response. They own original arcade games, and many of them have Punch Out. I know of a couple of guys who are restoring them there.

I'm not saying no-one here can help, but this is more of a MAME forum as opposed to dedicated.

Good luck.

[mgb]

I would clean any chip that is socketed. Not just the ones circled in red. I just showed those as an example
Of a socketed chip and those are the chips associated with graphics.
Just be careful when removing and replacing chips.
Also re-seat all ribbon cables.
You should also try cleaning the chip sockets with contact cleaner spray.
There's also a chance that one of the graphic proms has a bad socket or possibly bad solder joint on
A socket.

[MaximRecoil]

Check the +5 voltage at the board. I had similar graphical glitches in my Punch-Out, and found that the voltage was at +4.89 VDC. Adjusting it to +5 volts solved the problem. For the original PP-1000A power supply, the adjustment pot is inside at location VR2. Since the power supply's top housing has ventilation slots, you may be able to adjust the pot with a long thin screwdriver, but it is easier to just remove the top of the housing to adjust the voltage.

On the boardset's card edge, pins 15-18 are for +5 VDC, and pins 11-14 and 54-56 are ground.

[mgb]

That's good to know.
I wasn't sure if that psu had a 5 volt adjustment.
But I've found many times on games with video glitches,
that the 5 volts is low.
Of course this also a common cause game board resets too.

[kaneda]

I swapped in a new PCB and the glitch went away.  Didn't check the power supply, but maybe I should.

[mgb]

If you truly cleaned all socketed chip pins, you
may have a dirty or bad socket or a cold solder joint.