Hi, Laptop with Intel centrino T9600 processor and NVIDIA Quadro graphics card. As far as I know there was a CMOS 2032 battery replaced. After starting the laptop nothing is displayed on the screen, the backlight works. I thought maybe the bios was corrupted, I removed the 2032 for a while, plugged in only on the power supply and the laptop did one reset and continued the same symptom, black screen with backlight. I swapped the Ram with places, it does not change anything. Attached my bios and the other one downloaded from this forum, they are a bit different, could someone check if my bios is ok? After uploading the bios from forum is the same symptom. The FLASH (25L320) has a supply of 3.3V when turned on. It's possible that the KBC is faulty? Because when I connect, for example, a USB flash drive, nothing lights up, as if there is no communication.