I would like to ask about read parametr. I have PC HP All-in-one and after change SSD disk PC blackout, not even logo shown up, so i found instructions how to write newer bios(because led double flash and that me bios corrupted) using Arduino UNO to ROM_RECOVER bus.Firstly I try backup old ROM used command: sudo flashrom -p serprog:dev=/dev/ttyACM0:115200 -r old.ROM and after that I saw serial line sending data but after 10 minutes LED TX turn off and at Terminal is still Reading flash.... after 30minute waiting nothing happend. Will you advise me?

Thank you, 

in attachment is picture of terminal