water damage, 601 physical nand block offset 1

I'm no tech savy but I had the same problem with 4s it's been a month since I started getting nand error,4 iPhone techs told me it's done and not repairable due to many photos I was desperate to retrieve ,I bought power button proximity sensor flex from ebay for $4 I watch YouTube for tutorial,I wasn't sure what exactly had caused it but I cleaned any way by brushing the motherboard with isopropyl alcohol ,after replacing the power button proximity ,it worked I was so happy