4 Slot Video Ram Error

The_Chosen_One

Buriki One Master
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Feb 4, 2003
Posts
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cacfacc23f7a0f9b8aae1f88f64d7ee1.jpg


When I kicked on the Neo this week it booted up with this error, I can load games past it but they have a variety of graphical glitches if I do. Is this fixable?
 

mikejmoffitt

Mickey's Coach
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Feb 6, 2014
Posts
578
Could be a faulty VRAM chip, or a video data line leading to it is damaged. Usually (but not always) a severed connection results in it floating high or being seemingly random. Is it consistent?

Looks like bit 3 of the high VRAM chip is suspect. That's what you'll want to probe at first.
 

HeavyMachineGoob

My poontang misses Lenn Yang's wang
10 Year Member
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Apr 3, 2011
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If a data/address line has been broken, then the RAM error would happen at an address cusp, like say 0x10000. His error shows 0x61D, that most likely means the RAM chip itself has a stuck bit and has failed internally.

It's really not that hard to remove a SOP SRAM chip, the only scary part is potentially lifting the solder pads. Just don't force anything until the solder is molten.
 

The_Chosen_One

Buriki One Master
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Feb 4, 2003
Posts
2,241
Can anyone snap a pic of the chip(s) in question. I've got a parts board and a guy local who may be able to do the solder work for me


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