Hello,
I have a Radxa ROCK 5A 16GB (SKU 2573560, MPN RS120-D16P1) which does not boot.
Symptoms:
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Green power LED is on, RK3588S becomes slightly warm, but there is no HDMI output.
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It does not boot from eMMC.
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It also does not boot from a freshly written microSD card with eMMC removed.
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The board is detected in Maskrom mode:
DevNo=1 Vid=0x2207,Pid=0x350b,LocationID=1402 Maskrom
However, loading the bootloader always fails.
On Windows with RKDevTool 2.96:
Download Boot Start
Download Boot Fail
Note: please check ddr, please reset device and retry
On an Intel Mac with rkdeveloptool:
Downloading bootloader...
Downloading bootloader failed!
I tested both rk3588_spl_loader_v1.15.113.bin and MiniLoader, different USB cables, and tested with and without eMMC. The result is the same.
One unusual detail: USB-A alone does not cold-start the board. After applying USB-C power it appears in Maskrom. USB-C can then be disconnected and the board remains powered through USB-A.
Since the BootROM works but the loader cannot be started, could this indicate a DDR, DDR power, PMIC/power sequencing, or other hardware problem?
Are there any recommended test points/voltages or other hardware diagnostics for this failure?
I have several ROCK 5A boards available for comparison.
Thanks!