Fri May 08, 2020 10:12 pm
Install Retropie on the SD card using the Raspberry Pi Imager tool. If the no boot up problem continues, then purchase a new SD card or use a different operating system. I don't know how long SD cards last, SD cards can be purchased at any store that sells electronics. SD cards are not expensive either unless you plan to purchase high memory capacity SD cards. To back up data from the old SD card, you will need a SD card reader. I recommend a SD card reader to USB adapter, that is probably what they are called. Connect the old SD card to a computer then you will be able to access all of the data on the SD card.
I know all of the cool people are telling Raspberry PI computer people to overclock their computers. Overclocking the RPI computer can have consequences, more specifically overclocking can cause the computer to crash more frequently. If the computer crashes or freezes enough times, eventually the computer will not boot up. That happens to me, don't store important files on your computer unless you can back up the data. I recommend purchasing spare USB drives to store data. Avoid installing programs that can cause your computer to crash, or at least understand why the RPI computer freezes when using certain programs. This means searching for answers to the problem using Google search.