50g freezes on SD card access

[Claudio L.]

My 2 cents:
* Could be a power issue: fast cards might want to draw too much current. Repeat the test but with the calculator powered from the USB port.
* Repeat the test with newRPL. It uses a completely different SD card driver, much more flexible than the stock ROM. If newRPL can read them, then it's a software issue.

Other than that, there's not much else that can be done, if one of the pins that drives the SD card is fried, you won't be able to communicate. The pins come directly from the CPU so there's nothing you can replace. It would be very unlikely that one of the tiny resistors got damaged, and that's pretty much the only component that exists between the card and the CPU.