Help Likely dead S5, looking for advice / suggestions

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Greetings, I have an S5, G900T that had some water issues about 6 months ago. I put it in rice for a few days and tried to flash it back to stock, but apparently it still had moisture in it because it rebooted about 80% through the odin flash. I put it back in rice for a couple months and I'm trying to see if there's any chance of reviving it before selling it for parts. The phone boots to download mode, but will not boot to OS or recovery. If I load cwm or twrp, immediately on boot the phone says booting to recovery, it stays like that for 5 seconds or so, then vibrates twice and reboots. With a stock recovery I don't get that message but it does the same thing and never makes it past the initial logo screen. I've also noticed if I don't turn it on when plugging it in, I don't get the charging animation. I get a blank battery picture for about 10 seconds, then it immediately tries to boot. Any thoughts or suggestions would be appreciated. I've tried flashing old and new stock roms to it, but haven't had any luck yet. All of them show a pass through odin, but none make it past that initial logo screen.