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(Topic ID: 281879)

Jurassic Park freezes after Roar, no boot


By CaptainBig

12 days ago



Topic Stats

  • 16 posts
  • 6 Pinsiders participating
  • Latest reply 4 days ago by gdonovan
  • Topic is favorited by 1 Pinsider

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#1 12 days ago

I’m having an issue with my Jurassic Park pin, I’m not sure but it could have been hit with a power surge. We had some high winds and the power did flicker a few times before going out.
The issue it once I turn the machine on it lights up dot matrix does the Load screen then the game Roars and nothing, it just stops right at the time the music should start. The red light is on at the +5v, and I checked all the fuses I can see. I also have an Xpin powersupply board in that I replaced a few years ago. I’m not sure what to do next.

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#2 12 days ago

Review the Data East boot process here: https://www.pinwiki.com/wiki/index.php?title=Data_East/Sega#Data_East_CPU_Board_LED_Flash_Sequence_at_Boot_Up_When_Working_Properly

Where yours is different will provide a clue on troubleshooting the issue.

Move requested to modern area.

#3 10 days ago

XPin here!

What are your voltages measured at the +5, +12, and -12 testpoints of the PowerSupply? This would be the top row of led's on the supply.

#4 9 days ago

I’ve got 5.6, 12.1, and -16.1 at those points. Are those as they should be?

#5 9 days ago

1) Monitor the 5V and ground on the MPU, test points are right next to the battery holder.

2) Disconnect the sound board to eliminate it, I'd pull the power connector and ribbon cable.

#6 9 days ago

For that revision of the board the 5.6 is a little high but non-damaging. It would probably measure closer to 5.2V at the MPU. +12 is good but that -16V should be about -13.5.

Quoted from gdonovan:

2) Disconnect the sound board to eliminate it, I'd pull the power connector and ribbon cable.

I would definitely take the recommendation of eliminating the sound board from the equation. It is the only board in the system to use the -12. Most of the DE boards that I have provided tech support with regard to this power supply we had sound boards causing the issues. CAP replacements and a little bit of rebuild got things going again.

#7 8 days ago

I unplugged the sound bar and got a red flashing light on the PIA, still no boot though the game just sticks at the same spot with no sound.
I tested the points next to batteries on the mpu board and got 5 on the 5v and 0 on the ground.
Thank you guys for helping I’m really lost on tracing down the problem.

#8 5 days ago

Any ideas on what to look for next?

#9 5 days ago
Quoted from CaptainBig:

red flashing light on the PIA

It will flash, then pause, and flash again. How many flashes in between pauses?

#10 5 days ago

Can you take another picture with better light? This appears like you have alkaline battery corrosion, especially on the 40 pin CPU chip, and most certainly would be in the IC socket as well.

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#11 5 days ago

When I just unplug the ribbon there is no blinking. I took some up close photos, is hard to get the lighting correct, can you tell from this? I can take more if needed.

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#12 5 days ago

Definitely has some battery corrosion.

#13 5 days ago

You need new 40 pin socket for mpu possibly new 6802 chip or just cleaning corrosion on legs might work new battery holder or nvram and other general corrosion cleaning should be good to go after that

#14 5 days ago

After further review game rom socket looks like it needs to be replaced

#15 4 days ago

Should I replace those or attempt and clean them?

#16 4 days ago
Quoted from CaptainBig:

Should I replace those or attempt and clean them?

Replace.

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