How I fixed an Acer Aspire 7551G laptop that showed no screen output, did not beep and showed no reaction to any key pressed.

Well, I just removed the optical drive, removed the keyboard and the main cover. After this I unconnected the mainboard and replaced the CR2032 battery.

Reconnected everything. Done.

After setting the correct date in the BIOS the device just booted up and just worked again.

Someone else already had created this detailed disassembly guide, I later found out: Disassembling Acer Aspire 7551G