Quoted from JethroP:I should have E-720-20
Playboy requires "E-720-30" at U6
(Topic ID: 274881)
You're currently viewing posts by Pinsider quench.
Click here to go back to viewing the entire thread.
Quoted from JethroP:should I get a locked on LED at the second flash, or should the LED go out?
LED should always go out.
Flashing the LED requires the U7 6810 RAM to be functional.
Check continuity to all the pins of U7. The U7 RAM test only verifies data written to the RAM chip is the same as what's read back. It doesn't test that the address lines to the 6810 are working.
Other thing to check is if the CPU is AMI brand and its R/W signal is failing and becoming weak.
Please post pictures of the MPU board.
You're currently viewing posts by Pinsider quench.
Click here to go back to viewing the entire thread.
Reply
Wanna join the discussion? Please sign in to reply to this topic.
Hey there! Welcome to Pinside!
Donate to PinsideGreat to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!
