Hello,
does anyone know what to search for when your display shows "Open the Door" but everything is checked?
I ordered an Nvram and installed.The same.
The Mpu boots ,Pia led is off and the other 2 light as supposed.
I see on the display the audit message and then Open the Door.After that it stays blank(It gives me a command 80 message randomly).
Entering the diagnostic or audit it steps every 2 and i cannot change many...
Of course i have no sound.
I have checked voltage to Mpu...on the pin or on the bench.Looks ok.

I have no idea what to llok for any more...
any idea?

Hi to all LAH owners.
I have been trying to make my pinball working for the last 4 years!!!
At the beginning i had an Open the door problem.
A Member prompt me to put an nvram which i did.
This didn't solved the issue and the game started acting weirdly.
Sometimes i had blanking led sometimes no. I ended having only Pia & +5V.
I have checked Voltages and are OK.
I recently got a logic probe and a eprom programmer.
I burnt a leon's test eprom and it worked fine with everything working as should be,
I burnt a new 25712 eprom for CPu with 5.12 version and Blanking appeared again...Great news. Until putting the board on the game.
Now i get Vertical lines on the matrix display (4 lines 3 cm each which dissapear slowly from left to right )
No display is shown like version of game etc.
Is this related to the display eprom (Ic 27c040 )that i haven't updated?
As mentioned ,this has taken lot's of effort and time.It will be great if someone can guide me through the restoration of this great pinball.
My wife has already started asking to take it away from the living room!
Thank you all in advance!

Thank you dimthedaylights & arolden ,
I have been working really slowly on this and i have learned a lot.
It is dissapointeed thought to fix something and found another wall -problem.
The issue with the display is totally new. Before i had an open the door message with no horizontal lines.
Can this be solved by burning a new display rom?
This is not so easy in Greece ,therefore any suggestion on any direction is really welcomed.

Cables checked.
I found a blown fuse F2 8 A sl-Bl broken and after short search i found the rectifier bad. I changed both .
the Display problem solved . But i have another issue.
After the Data East display i have an open the Door message. It makes sense as i changed the battery with an Nvram and i haven't adjust the game. Or not?
If i close the door the game does nothing . The switch is tested ok.
Also,at start ,the pinball triggers all solenoids in a sequence and stops. Lights are open .
There is no sound and i cannot start a game.
Trying to get into Diagnostics i can only see only every 2 adjustments (00, 02 etc )with no ability to change them pressing the start button.
I am sure that the solution maybe something easy (I hope ) but i have no idea what.

It really helped.I am almost at the point of playing. The game plays but i have no sound nor Display.
It starts with the Data east display and then nothing. The game seems that plays fine without them.
I should say that i upgrated the CPU rom to A1.12 without touching the display or sound roms.
Do you believe it is related to this?

I am facing a wall .
As i have posted earlier when i power the game i have a display version message with the version but then nothing on display.
I can feed credits and play but without sound and display.
I have checked voltages in Sound board and are fine.
Display is also fine as i have the initial display msg.

I cannot also enter into audit mode.
The door switch , Green and black switch are tested also ok.
Even if i keep up or down the green button, when i press the Black button i enter in Diagnostic.
There , i can move only every 2 steps and i cannot really change the settings (Only a few of them ). For instance , audit sound stays into No ,but i can change gave level to Easy or Moderate.
I have changed the 6264 ic with an anypin Nvram as i have removed the Battery
Also something weird is that a "Command 80 " flashes randomly on display.

I will appreciate if someone has an idea of what to search for.

Does anyone has any idea to start searching for?
It will more than helpful as i am totally out of thinking anything else.....

The Nvram is in the correct order and the game rom is also fine. Recently i burnt a new 27512 CPU ram with the latest version a1.12.
I haven't updated the Display and Sound Roms. Do you believe that they don't communicate properly with each other?
I will order tomorrow the 4 Eproms to check this also.

It may be the problem . I will check it the soonest i receive the roms.
My main concern is that i have no audit /adjastments. I can only get into diagnostic which doesn't also works as it should.
The soonest i have the results i will make a post.
Have a nice weekend.

You might also want to double check and verify that the game rom you made is ok.</blockquo

I do have +5 &Blanking Led lights when i power up the game as i must have . I burnt in a 27512 Eprom the latest program -Ver A1.12.
I cannot verify in any other way the game rom except for burning a new eprom. Or there is another easy way?

Hi again .
My problem still exist although i have just changed roms with new ones (Game ,display, sound ).
When i start the game i have the Version display,then the Open the Door and then nothing.
I can add credits and the game seems to play but without display and sound.
I have done everything i can the last 5 years and still nothing. Pia's seemed to work well when using a leon's test eprom in my workbench.
Does someone has any suggestion to start again searching for?

Yes ,indeed. 12 Volt is ok on both DMD and Sound board.
It is weird to have a working display at the beggining and then even when in play, have nothing except a random Command 80 that appears in Display.
It is very annoying having a game in great condition but not in operation for years.
I have no other idea of what to do.

Hi LAH owners,
I have a sound problem which i hope someone will be willing to help.When i boot ,there is no sound entry. Display and game plays but without sound in general. When Ribbon cable CN21 is removed(Has been check having continuity ) i hear I'll be back sound so i believe that the sound board works. I have also recently changed sound Pal's ,display and game eprom .Voltages measured and fine as supposed. Pot turn and gives a small increasing hum that indicates that Pot is working.Any idea?
I checked also Pia at 7B and i have inputs pulsing but output at high Stage. Is this normal?
I do have a logic probe and oscillator.

Any idea will be much appreciated.

Trying to figure out if Mpu doesn't trigger sounds from Sound Board and after inserting & taking out the ribbon cable at CN21 i heard game sound when trying to connent male connector with ribbon (Only when it is disconnected ).And sound played on a loop . So what i believe is that somehow i connected some pins from CN21 and triggered the sound board to produce background sound. When i connect the ribbon cable all in this stops.
Maybe a 6821 Sound Pia causes this problem? the weird thing is that i have tested them with a Leon's Test Eprom in MPU and all outputs seemed OK!
I have been searching all over for anything related to this but nothing. ?????

The ribbon cable was reversed after fixing my previous Open the Door Problem with no display and sound activity. I checked it and now it is as should be butagain with no sound.
I have narrowed my search in U7 Sound PIA .In one of the Network Resistance 4K7 Ohm, one of the leg measures out of specs. It goes to pin 39 that with Leon Test on board should go high and low.It is stucked low at about 1 Volt
Do you believe this may be the problem?
I have already ordered PIA that it will take for ever to arrive in Greece. Let's hope.

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Thank you PinballManiac40 for your suggestions. I Changed Pia at 7B with an 6821 from My Eight ball Deluxe Sound Board and the sound problem is finally over. New balls on Game , a new playfield Protector ,New Leds installed and the game is now amazing.
rapidflipper dynamite is also great looking mod that will be the next to do. Thank you all for any support given.

For general playfield cleaning you can use novus 2 . I have also used a common housecleaning product that must be available to Spain , Cif. It cleans really well.At least for my really dirty pinballs before restoration did meracles. Naptha is the equivalent to Zippo Gas. (There is a product with the same name in Europe but it is Turpentine oil from Pine trees but don;t use it.). For the Mylar that has pealed you may add a small piece and connect it with the rest of playfield.