Banana Pi BPI-F3 16GB sudden shutdown during build – now won’t power on (red+green LED flash)

Banana PI RISC-V Design BPI-F3/BPI-CM6(SpacemiT K1)
1

Hi, I was using my Banana Pi BPI-F3 (16GB RAM variant) to build a tool using make -j6. The system was running fine and I was monitoring the temperature using a system monitor. It was consistently around 65 °C, and the build had reached about 80% completion.

Suddenly, the board powered off by itself with no warning.

Now when I try to power it on:

  • The board doesn’t boot
  • Pressing the power button or reconnecting power only causes a single brief flash of red and green LEDs at the same time
  • No HDMI signal, and no further LED activity after that

I was using a heatsink with thermal pads, but I now suspect the thermal contact may have been poor. The pad wasn’t very sticky and came off easily.

Is this a thermal shutdown? Or could it be any hardware failure? Need help with diagnosing or recovering the board