Hi All,
Our Data East Jurassic Park sometimes takes ages to boot (well a couple of minutes) and when it's hanging we get the following symptoms
5v on
PIA on
Blanking off
Screen on but nothing from the MPU.
This will then sort itself out and start booting but sometimes with corrupted sound during boot.
The game will then play perfectly for as long as we play it (even some hours) If the game is turned off and back on it always boots quickly, with the correct LED sequence, sounds etc.
I did check the PIA chip and it is seated properly etc. The symptoms make me wonder if there's a cap going bad (or we have a dry solder joint somewhere) What's the easiest way to check? See if the 5v rail is actually 5v and has no ripple on it?
The power board is all original as far as I know.
Our Data East Jurassic Park sometimes takes ages to boot (well a couple of minutes) and when it's hanging we get the following symptoms
5v on
PIA on
Blanking off
Screen on but nothing from the MPU.
This will then sort itself out and start booting but sometimes with corrupted sound during boot.
The game will then play perfectly for as long as we play it (even some hours) If the game is turned off and back on it always boots quickly, with the correct LED sequence, sounds etc.
I did check the PIA chip and it is seated properly etc. The symptoms make me wonder if there's a cap going bad (or we have a dry solder joint somewhere) What's the easiest way to check? See if the 5v rail is actually 5v and has no ripple on it?
The power board is all original as far as I know.