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[sturgeongeneral]

Here is a pic of the varta battery  area. Looks good.

[qbert]

Does not look that good at all to me.
Traces look wiped where the board is cleaned to the copper.
My guess is that board is not good and it is very typical that even though it was off for many months the alkali from where the varta used to be still continues it's destruction.

[Retro tech repair]

Yes, power supply was purchased from a vendor on this site and replaced. The connector pins and plug looked perfect, no issues. For a while if I left the machine on the fault would clear after about an hour and machine would be ready. However. I tried a Key and clear and can't finish the process. As starting and restarting machine throughout the process eventually the error returns and I can't finish. That is where it is now.

If the problem goes away after letting sit that is a dead giveaway that the sin-in circuit has failed in the post supply.

[sturgeongeneral]

Does not look that good at all to me.
Traces look wiped where the board is cleaned to the copper.
My guess is that board is not good and it is very typical that even though it was off for many months the alkali from where the varta used to be still continues it's destruction.

Could you show me what you mean about the board please? Also do you think changing the board will correct the problem?

[sixcardmark]

Look inside the rectangle where the varta was.  Copper traces are exposed and almost gone.  Board needs repaired or replaced.

[sturgeongeneral]

Look inside the rectangle where the varta was.  Copper traces are exposed and almost gone.  Board needs repaired or replaced.

Are you talking about the lower right hand corner area?

[Stayouttadabunker]

Are you talking about the lower right hand corner area?

Yep. The tiny traces are totally exposed & unprotected in that area...they don't even look continuous. 
The battery acid is eating your board alive.
 
It's time to get another MPU board and swap your chips into it to get this machine working again or pull the plug & sell the cabinet out as a parts only machine.
You can send out the board to be repaired, but by the extensive damage to all the circuit traces, I'm sure it's not going to be an easy repair job nor inexpensive.
Some of these men here can tell you exactly what such a repair job entails, their cost and time but the engine is blown on this puppy.

[Jim]

sturgeon,  tried to send you a pm,  your box is full.

Jim

[sturgeongeneral]

Does anyone have a spare board you can sell me?

[Retro tech repair]

Are you talking about the lower right hand corner area?

Yep. The tiny traces are totally exposed & unprotected in that area...they don't even look continuous. 
The battery acid is eating your board alive.
 
It's time to get another MPU board and swap your chips into it to get this machine working again or pull the plug & sell the cabinet out as a parts only machine.
You can send out the board to be repaired, but by the extensive damage to all the circuit traces, I'm sure it's not going to be an easy repair job nor inexpensive.
Some of these men here can tell you exactly what such a repair job entails, their cost and time but the engine is blown on this puppy.

Looks like glare from camera flash.

[qbert]

You can see breaks going to u77 in at least two places

[Retro tech repair]

You can see breaks going to u77 in at least two places

Too much glare from camera flash to tell if breaks in traces. What looks like exposed copper is glare.

[qbert]

Blow up the very first picture.
No glare ....break in trace

[Retro tech repair]

Blow up the very first picture.
No glare ....break in trace

I don’t know what picture your looking at all i see is a hot spot from a flash and crazy bad glare.

[qbert]

Same picture your looking at.

[Retro tech repair]

Same picture your looking at.

And again im saying the fash has made too much glare to say if those traces are bad. We need better pictures. I see maybe one trace that may be bad in your circle but even if that was the case u77 would have to be dead short to cause the board not to boot.

[qbert]

Here is another, There are more all over the board it is toast. Yes it's a bad picture but the evidence is there.
Alkali damage all over the board.

[Retro tech repair]

Here is another, There are more all over the board it is toast. Yes it's a bad picture but the evidence is there.
Alkali damage all over the board.

I have repaired hundreds of these boards from varta damage the picture is too bad to say either way what you are looking at is glare and artifacts from the camera flash. Varta damage does not leave smooth shiny traces it leaves dull black fuzzy traces with lumps and pits. What does leave smooth shiny looking traces is a later board with glossy silk screen that has had a photo taken of it with a flash. That shine that we are seeing in the pin’s through holes and silk screen would be gone if this board was in as bad of shape as everyone is saying it is. Im not saying there is no varta damping what i am saying is it’s impossible to say yes or no from a picture taken with a flash.

[qbert]

We agree that it is hard to tell from the pictures. But I will bet the shiny copper was from someone trying to clean the board with something and that probably did more damage.

[Retro tech repair]

We agree that it is hard to tell from the pictures. But I will bet the shiny copper was from someone trying to clean the board with something and that probably did more damage.

Thats not the copper your seeing its a circle of glair around the hot spot from the flash. Could it be hiding damage or exposed copper yes that it not what a cleaned board looks like. Everything is too shiny. Even if it was copper that was sanded down it would not be shiny it would be dull from whatever stripped off the silk screen. That silk screen takes a lot of effort to remove cleanly any method that would remove if from that large if an area would leave very obvious damage to the surrounding area. And if it was varta damage it usually attacks the pins first leaving them green or black not shiny. Literally all i do all day every day is sit at a bench fixing these board. I look at a lot of pictures of boards to try and assess how bad they are. if im saying it’s impossible to say one way or another frome these pictures it’s impossible.