Need help with spi incircuit programming

[wofei]

Hi@all
I have a rockpro64 V2.1 board with no reaction. Neither serial output, nor any blinking leds after power on. Now i want to flash the u-boot to to the spi chip for trying to boot from usb. Unfortunatley, the sd- and the emmc ports are not available, fixed with glue. (the rockpro is build in a test equipment for cars, bought 4 years ago from my cousin for about 4000 euros, these days was the first try, but this thing is dead, warranty is over and repair from the reseller is not possible)
Is there a way to flash the spi in circuit with the available *-img files? I can read and write the spi chip with my raspberry, but i can´t find a rom file, only img files..
thanks, wofei

[KC9UDX]

In my opinion you'd be better off buying a new RockPro64.

[wdt]

I have one of these. The 1st time I tried to start it, got a flashing red led (=5V)
(and nothing worked, no serial or anything)
many of the PS (connected to osciloscope) had +1V ripple, when connected to
an adjustable PS red led did NOT flash, all worked OK
I did find a PS that had less ripple, now running,, 45d uptime now
So,... check power

[wofei]

I have one of these.  The 1st time I tried to start it, got a flashing red led (=5V)
(and nothing worked, no serial or anything)
many of the PS (connected to osciloscope) had +1V ripple, when connected to
an adjustable PS red led did NOT flash, all worked OK
I did find a PS that had less ripple, now running,, 45d uptime now
So,... check power

ok, thanks a lot, i´ll try :-)
maybe a dry cap in the PS

Tried an other PS. No boot :-)