Neo Geo 6 slot WRAM issue
- Thread starter jerryspaghetti
- Start date
jerryspaghetti
Active member
Just remember that if you replace the battery with a non rechargeable then you have to remove that resistor next to it to disable the charging circuit
Retroman839
Senior Member
I have about 10 mvs that I need
To do same fixes
2 six slots
Bad ram
To do same fixes
2 six slots
Bad ram
jerryspaghetti
Active member
FIXED!!
So I watched some videos and did some research and fixed the issue.
As per the diagnostic chip, it was the lower WRAM on my 6 slot which is the one I’d previously thought. I couldn’t find the exact spec chip (in terms of speed original 12L replacement 90L) anywhere hence the long delay in sorting it but I spoke with Craig Goodwin on Facebook who had replaced ram on his 1 slots with success and he advised that the chip speed shouldnt be an issue.
So I bit the bullet and bought a pack of 90L chips from Poland which arrived last week. I invested in a rework station/heat gun. I whipped the bad ram off and chucked the new one in and was delighted to find it actually fixed it!!
Now it’s all working perfect with all 6 slots doing the business!
Thanks for the advice here and if I can help at all please ask!
Below is the screen i was getting.
jerryspaghetti2022-05-06 00:09:18
So I watched some videos and did some research and fixed the issue.
As per the diagnostic chip, it was the lower WRAM on my 6 slot which is the one I’d previously thought. I couldn’t find the exact spec chip (in terms of speed original 12L replacement 90L) anywhere hence the long delay in sorting it but I spoke with Craig Goodwin on Facebook who had replaced ram on his 1 slots with success and he advised that the chip speed shouldnt be an issue.
So I bit the bullet and bought a pack of 90L chips from Poland which arrived last week. I invested in a rework station/heat gun. I whipped the bad ram off and chucked the new one in and was delighted to find it actually fixed it!!
Now it’s all working perfect with all 6 slots doing the business!
Thanks for the advice here and if I can help at all please ask!
Below is the screen i was getting.
jerryspaghetti
Active member
Player said:How many did you buy?. You got a link as i'm pretty sure i'll have same issue. I also have a 1 slot to sort with again same problem. Any help much appreciated
Came in a pack of 10. I used 1 and would like to keep 5 in case any of the others go but PM me your address and i'll post you the other 4 mate.
Cheers
jerryspaghetti
Active member
Here's the link to the chips if anyone else needs any:
https://www.ebay.co.uk/itm/293876655319
https://www.ebay.co.uk/itm/293876655319
Retroman839
Senior Member
Yeh cheeers for heads up I got same issue
Evening all. Just fitted my bios diagnosis chip and...
So I tried loading up the carts again and:
I'm assuming that i'm replacing the normal bios chip when i fit the diagnosis chip. Could my bios chip be bust, or is there something else i'm missing. i did the looping RAM tests and no issues. Not quite sure where to go from here. Any advice/help much appreciated.
Cheers
John
Player2022-05-17 22:55:59
So I tried loading up the carts again and:
I'm assuming that i'm replacing the normal bios chip when i fit the diagnosis chip. Could my bios chip be bust, or is there something else i'm missing. i did the looping RAM tests and no issues. Not quite sure where to go from here. Any advice/help much appreciated.
Cheers
John
Player2022-05-17 22:55:59
jerryspaghetti
Active member
Maybe get a unibios chip? They’re less than 15-20 quid. Could be as simple as that.
ChrisBEANS
Active member
jerryspaghetti said:
Exactly this…
That’s the right image for a standard Bios… if it boots no further and hangs at that point, maybe get a new bios. It’s absolutely worth getting the UniBios anyway.
Also, in the mean time, make sure the socket for the bios is clean, and all the legs on the chip are all good, clean, and comfortably slotted into the socket
Retroman839
Senior Member
Have you used deoxit on all your cartridge slots and cartridge contacts
Also worth doing the small contacts between the two motherboard pcbs
Also worth doing the small contacts between the two motherboard pcbs
Retroman839
Senior Member
Player said:I assume they just fit straight in, no modifiactions etc? Seems the only thing it could be unless the diagnosis chip has missed something or i have
I have if you want pm me
Retroman839 said:Player said:I assume they just fit straight in, no modifiactions etc? Seems the only thing it could be unless the diagnosis chip has missed something or i have
I have if you want pm me
PM sent
ChrisBEANS
Active member
Player said:
You don’t need to populate all the slots. The mobo will just ignore any unpopulated slots.
You can clean most things on there with isopropyl alcohol and a toothbrush.
ChrisBEANS
Active member
Does the machine just hang at the garbled green bios screen?
If you boot it with no games, do you get the crosshatch screen?
If you boot it with no games, do you get the crosshatch screen?