For a water damage iphone woud it be easier to replace the logic board than clean it?

I bought an iphone 4 from ebay, the owner said it dropped it and had water damage, the front and back plate are broken but I don't really care about that, I've been looking for videos in youtube on how to fix the water damage iphone 4 but all I see is cleaning the logic board it with some alcohol now I don't wanna do a lot of work but i'm just wondering would it be easier to replace the logic board with a new one instead of cleaning it with alcohol?

Logic boards cost a lot of money my friend. Also I have a feeling that phone is damaged beyond repair. Don't waste your time or money. Resell

  • Will changing the logic board on an iphone 5s take it out of recovery mode? My iphone 5s is stuck in recovery mode / DFU. Only get an apple symbol when put on charge which keep flickering on and off. When trying to restore via itunes i keep gettin code 4005 or 3014. Would replacing the logic board fix this? If so would i need to replace any other components at the same time? any other suggestions?
  • Where is the memory storage on an iPhone 4 logic board? If I take apart my iPhone 4 which part of the logic board would have the storage saved from old photos, apps, and text messages. There's a TON of old memories in my iPhone 4 and I'd really love to retrieve them.
  • Where can i buy a iphone 4 logic board? I need a new iphone 4 logic board, i can't afford to get a new iphone, so I was wondering if anybody knows where to get a new motherboard. I looked on ebay, but i'm not so trusting with the sellers on there. If anybody knows of a legit site that won't break the bank, I would really appreciate it.
  • What happens if you replace the logic board in an iphone 4s? I have a Verizon iphone 4s. The logic board is in perfect condition and so is the SIM card, but it is the outer components that are requiring me to get a new phone. I want to just replace the logic board and SIM card from the new phone with my old ones. Is this possible? And once I receive the new phone, can I just install my original logic board and SIM card or should I try to activate the phone first?