Hi All,
I have a Data East -Last Action Hero pinball which i am trying to restore for a couple of years with no results.
The Covid Lockdown was the perfect time to get my soul into restoring it .
The initial problem was ... weird behavior with an Open the Door display.
After removing the battery with no sign of corrosion i installed an NVram.
With the board on my bench i stated only Pia and +5 Volts. Sometimes though the PIA was off and blanking on-Weird!!!
I recently got an ic programmer and burnt a 27512 test eprom. It worked great as supposed.
So, i figured that the CPU ROM was faulty-true after checking it on my programmer.
So i burnt a new CPU ROM V1.12 and installed.
When i fired the game , the display shows only 4 big vertical lines (with 1-2 disappearing after a short time -the left side ones ).
Is this a result of not upgrading the driver board (I haven't changed roms for Sound and display )?

I will really appreciate your suggestions as this project has taken lot of effort and time to be solved.
Someone will be my hero .
Thank you in advance ...from sunny Greece.
Iordanis

Hi Again,
The game doesn't boot although the solenoids are triggered at the beggining.
No sound.
The Display shows only 4 vertical lines that after a while disappear.
I check voltages and found
-115 Volt
-93 Volt
G
G
+5 Volt
nothing.
68 Volts.
After that i checked the fuses and i found that the 8A Slow Blow was bad.
I need to wait until tomorrow to check if this is the problem.
Oh really lets hope to be this only.
I will post the results.
Thank you again for your help.
I really appreciate this.

Great.. we had some progress but it is not operational yet.
As i mentioned ,i found a +12 Volt missing. I checked the fuse F2 8A and was broken .It was due to a bad brigde rectifier which i changed.
Now ,i have a Fully working display.
Of course the machine has issues.
After displaying the data east Version it shows an Open the Door msg.
I close the door . Nothing.
Just to inform that i have removed recently the Battery and installed an NVram at 5D.
When the game starts all solenoids are triggered and stop.Lights also keep on flashing.
No sound at all.
I cannot start a game and in Diagnostic mode i can see only every two adjustments(00 ,02 ,04 etc )without being able to change most of them ) by pressing the game button.
My brain is on fire!!!

I just changed the ram and the problem is worst.
I have only the data east Display with nothing else after.
As i remember now, that was the reason to move towards an Nvram solution 4-5 years ago!
With the Nvram i have the Open the door Message.
I have checked again the door switch and on #14 connector it gives the proper continuity when close.

I haven't checked yet the voltages on the game. On the bench everything was ok.

Also something else that i noticed is that i can enter only in diagnostic mode and no in Audit at all.
Also , in diagnostic mode there is an option to enable sound which is Off but there is no way to change it.
In diagnostic i can move up/down only every second number

The Mpu is booting with the Pia flashing only initially for short time and then i have both +5Volt plus Blanking led stable.
I have tested on my bench with a leon test Eprom and everything was ok.
I am thinking if this is a memory problem .
I have changed the the 5 d chip with an NVram to stop using Batteries.
the memory protect switch works fine and give at 1F chip Pin 11 a high Low Pulse (With the door switch closed otherwise Low ) ,Pin 12 High Pulse and 13 inverted a Low Pulse.
It ends to have High pulse at pin 27 5D cmos ram even if the door is closed or open.

Also , when i plug off the Cn21 ribbon cable i get the sound "I'll be here". So the sound board should be working.

Hi to all,
I was able to solve the "Open the door " meg when powering up the game.
Procedures that were done prior to fixingUsi it:
1. Checked D5 Diode (As i removed Battery holder ) ,was ok.
2. Install NVRam.
3. Checked Voltage from Power Supply -Ok
4. Checked Door Switch -Ok
5. Check 6802 Ic- Ok.
6. Burned in Epprom a leon's Test Chip. Installed in 5C and test in work bench results.
7.Alphanumeric Segment/Sound Control Pia at 8B should had pins 3-17 high & Low in test mode. I found that pin 14-17 were low .
8. Install a new socket and new 6821 PIA.
9.The game starts now but with no Sound (No boot sound ,no sound during Play).When i remove the ribbon cable that goes to Sound board i hear "I 'll be back Voice" .So now i assume that the sound board works fine but MPU still has problems that the Test Eprom cannot find.

I would like to thank again all you that helped and will help again in all our repairing attempts