My s4 has been doing this since yesterday where it shuts off and wont be able to turn on. It happened once yesterday and I booted to recovery and wiped data and it fixed the issue. I updated my phone today with odin to ND1(I have a US Cellular s4) and it seemed fine. It shut off randomly once and I didn't think anything of it and it booted up fine. I flashed the Cyanogenmod may 3rd nightly and it was working just perfectly with no problems.
Later today I take it out of my pocket and it wont boot. Cant get to recovery, or download mode. All that happens is it flashes the boot screen for a second or two then goes blank.
Could this be a hardware problem?
If not any idea how to fix this???