I've raspberryRaspberry Pi 3 b+ which is 2 years old since I purchased it. Recently, it has started behaving very strangely. I've installed a new rated power supply (5V 2A) for piPi board. The board runs finesfine for couple of hours without andany over/low voltage complaints, but after sometimeawhile it turns off completely. When I tried to boot it again, only red and green light iswere on without any blinkblinking. According to various forums, most of them said my sdSD card is faulty I've checked my sdSD card several timetimes reflashed it with new a image. Still, it doesn't bootsboot. Following this issue, I kept my piPi board off for 2 days, and when I gave last tried it successfully booted andwith no loss of data. But after 45 mins, it again started behaving as described earlier. In such a condition, neither display or Ethernet ports are responding. I'm not doing and heavy task Pi just running a FTP server. I've even installed heat sink plus 5V fan(being powered through GPIO pins of board)
UPDATE: I've kept my pi off for 2 days and then powered it with last hope with it's rated power supply but without the heatsink fan. It ishas been working fine for almost 6+ hours with old SD card. I think the fan which I had connected to pi on +5V & GND areis not supposed to dobe done that way. Due to such faulty connection the polyfuse blows up and take hours/days or may be week to get rewired. I got this to know by visiting various forums. More if you know on comment below.
