Please help with 3GS

I bought the phone from someone who had no history, just told me that it gives error 37 when you try to restore from iTunes. I tried to restore from iTunes and got the error 37

I tried downloading an older iOS and do shift + restore which gives me error 3194

I tried to “fix recovery” with Tiny Umbrella, after setting TU to compatability w/XP and set as administrater, and I get the log below:
01/25/2013
08:55:19.406 Caching shsh files...
01/25/2013 08:55:19.422 Found [0] shsh files to cache...
01/25/2013 08:55:19.422 Cached [0] shsh files
01/25/2013 08:55:19.422 You are using the current version of TinyUmbrella.
01/25/2013 08:55:19.438 Loaded History...
01/25/2013 08:55:25.072 DFU Device connected
01/25/2013 08:56:20.359 Attempting to fix recovery...
01/25/2013 08:56:33.720 Starting fix recovery sequence...
01/25/2013 08:56:33.752 DFU Device disconnected
01/25/2013 08:56:33.768 DFU Device connected
01/25/2013 08:56:33.768 Fix Recovery has finished. Allow device to reboot!

If I try to boot with Redsnow I get this:
Missing keys.plist data for this build:
Device: iphone 3gs
ECID: 3069577819599
Build: iphone2,1_6.0.1_10A523

If I try to fix this by pointing Redsnow to iOS 6.0 (like some say to do) and running “just boot”, then I got a short look at a pineapple (freaky) and then nothing
After all the messing around above, I tried to restore in iTunes and got error 1600
This phone has the new boot version

I'm beginning to think this phone has a corrupted NAND chip. Does anyone know how to confirm this?