Measure the resistance from J2 pin2 to GND and to VCC

Get your Multimeter, we need to confirm some connections..

While I am checking this, please connect U1 pin14 an U2 pin14 with a short patch wire

How is J2 set? On or off?

Try GemBench

I suppose the L1 Cache is still off

Later.. let us try J4 first..

Please try to boot with J4 = off

What are the GemBench test results with these jumper settings?
The PCB patch will follow this evening, when I am back home..

Now change the jumper setting as follows:
J1=off
J2=off
J3=on
J4 has to stay on for now.. since there is still the PCB patch pending..