[cz7asm]

From what I tried it really doesn't matter what PIMM module or GPU is in - it happens the same way even if I disconnect them. However, GPU is V10 and PIMM with 600MHz CPU.

Another observation is a difference in power consumption. When I test it using bench power supply for 5V AUX rail, it behave the same but at least I can see the difference in current - the state when it hangs eats about ~270mA whereas the working state jumps to ~280mA.

I thought of a couple of tests I must try out, one of which is using different NVRAM module. Yesterday I found out that the machine doesn't start L1 when the NVRAM Dallas chip is not inserted so there might be some connection. Also some bad capacitors might cause this but I have a feeling this is not the case.