I have a Samsung Galaxy S4, it had some charging problems, I replaced usb port and it fixed it for a while but one night I left it to charge and in the morning phone didn't respond to charger or power button being pressed, I borrowed full battery from my friend to see if I should buy a new one but it didn't want to power on even with a charged one, guy at repair shop says it's most likely the motherboard and I would be better off just buying a new phone but I would like to repair it since S4 is a really good phone for it's price. Now the question is - should I repair it or look for a new phone? I don't want to spend more than $70 and ones cheaper than that are worse. How likely is it that after replacing motherboard everything will work fine again? Btw buying used S4 wouldn't be much more expensive so I have to decide whether I want a new motherboard which would be fast but not sure if working or used phone that works but is probably slower.