Can only wake iPhone 4 using charger if left
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Hi! My phone recently got dropped into the lake, but I managed to get it to work, with only some things not working. The problem is that if i lock the phone without waking it for approximately 15 seconds, it acts like battery is drained, not even vibrating when putting silent mode on. Although if I connect the charger the scteen just lights up normally as if nothing happened (no bootlogo or anything) is the battery failing or would it just be a waste of time and money replacing it? If i have music or something on while it is locked, everything works normally. Help and solutions would be appreciated greatly. Off topic, wifi shows as "no wifi" and is greyed out in settings, i believe the chip on the logicboard is faulty, would I be able to replace it or would that require replacing the whole logicboard?
Thanks in advance