I used the bios patcher bp-4rc71 from apple_rom to update the CPU names, microcodes, etc. of my SY-6VCA BIOS. Afterwards I flashed the BIOS and did a warm start and everything looks fine

But every time when doing a power on cold start the system hangs with a black screen ... not even the graphic card setup is displayed. The only possibility is to press the reset button to perform a warm start. Then the graphic card is correctly initialized and the BIOS shows the POST screen ...
Always hitting the reset button, when power up the system is a little bit annoying

I'm wondering if somebody else has the same problem!?
Any help or comment is welcome.
Greets GM