DCrosby
n00b
- Joined
- Aug 15, 2021
- Posts
- 34
So I had a party over labor day, and the machine was sitting in Attract mode, when I started hearing the Coin Counter fire, at first slowly and then quicker. I shut the machine down. Let it cool and booted it again. Booted fine, and then the coin counter started counting, I checked the coin mech and disconnected everything on the coin mechs, looking for a short. None to be found, coin counter continued to count. So I shut it down again and disconnected the coin counter, figuring I'd check it later. The machine booted and ran fine. For another hour or so, when I had to shut it down to power a vaccuum for getting the patio ready, and when I re-started the 4 Slot, I got a backup memory error. At first it wasn't FF40 but I couldn't tell you what the value was. I then shut it down, and turned it back on, and now it's consistant FF40, and I have Unibios, so I was able to run the party on single slot AES mode, and figured I'd check the error later. Well later is now, and I looked at it, "Ok it's the backup ram, the lower 2 chips on the board"
I ordered the replacements on Digikey, de-soldered the old ones, and then replaced them with the new ones. No dice, same error FF40. So I started searching, and found the HC32 had to be connected to pins 16, from two of it's(HC32's) Pins. Ok Check it is... also checked pin 27 to the CPU check has continuity...
So now I'm at a loss, should I start ordering another HC32? And maybe the original memory chips weren't bad...
I'm thinking of connecting a logic probe up to the HC32 and the memory's Pin 16 to see if I see activity... but... I'm just stabbing in the dark here.
I ordered the replacements on Digikey, de-soldered the old ones, and then replaced them with the new ones. No dice, same error FF40. So I started searching, and found the HC32 had to be connected to pins 16, from two of it's(HC32's) Pins. Ok Check it is... also checked pin 27 to the CPU check has continuity...
So now I'm at a loss, should I start ordering another HC32? And maybe the original memory chips weren't bad...
I'm thinking of connecting a logic probe up to the HC32 and the memory's Pin 16 to see if I see activity... but... I'm just stabbing in the dark here.